# What is CVE-2023-0858? > CVE-2023-0858 is a medium-severity flaw (CVSS 5.3) in Lbp1127c from Canon, published on 11 May 2023. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.6%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2023-0858 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 23 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.3 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.6% (latest exploit-likelihood forecast) - **Published:** 11 May 2023 - **Record last updated:** 7 November 2023 - **Main product:** Lbp1127c from Canon - **Affected products:** 90 ## What is CVE-2023-0858? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data. ### The official description Improper Authentication of RemoteUI of Office / Small Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger unauthorized access to the product. *:Satera LBP660C Series/LBP620C Series/MF740C Series/MF640C Series firmware Ver.11.04 and earlier sold in Japan. Color imageCLASS LBP660C Series/LBP 620C Series/X LBP1127C/MF740C Series/MF640C Series/X MF1127C firmware Ver.11.04 and earlier sold in US. i-SENSYS LBP660C Series/LBP620C Series/MF740C Series/MF640C Series, C1127P, C1127iF, C1127i firmware Ver.11.04 and earlier sold in Europe. ### What kind of flaw is it? - CWE-287: Improper Authentication - CWE-284: Improper Access Control ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can read some data Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N` ## Is CVE-2023-0858 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.6%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.6%, 0.6%, 0.6%, 0.6%, 0.6%, 0.6%, 0.6%. ### Timeline - 11 May 2023: Published - 7 November 2023: Record last updated ### How Precursor Intelligence ranks it CVE-2023-0858 scores **23 out of 100 (Low)**, with the action "Monitor". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: smaller factor - Threat activity around it: smaller factor 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2023-0858? The published record lists 90 products. - [Lbp1127c](https://www.precursorintelligence.com/product/canon/lbp1127c) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Lbp621cw](https://www.precursorintelligence.com/product/canon/i-sensys_lbp621cw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Lbp621cw Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_lbp621cw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Lbp623cdw](https://www.precursorintelligence.com/product/canon/i-sensys_lbp623cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Lbp623cdw Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_lbp623cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Lbp633cdw](https://www.precursorintelligence.com/product/canon/i-sensys_lbp633cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Lbp633cdw Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_lbp633cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Lbp664cx](https://www.precursorintelligence.com/product/canon/i-sensys_lbp664cx) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Lbp664cx Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_lbp664cx_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Mf641cw](https://www.precursorintelligence.com/product/canon/i-sensys_mf641cw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Mf641cw Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_mf641cw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Mf643cdw](https://www.precursorintelligence.com/product/canon/i-sensys_mf643cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Mf643cdw Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_mf643cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Mf645cx](https://www.precursorintelligence.com/product/canon/i-sensys_mf645cx) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Mf645cx Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_mf645cx_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Mf742cdw](https://www.precursorintelligence.com/product/canon/i-sensys_mf742cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Mf742cdw Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_mf742cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Mf744cdw](https://www.precursorintelligence.com/product/canon/i-sensys_mf744cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Mf744cdw Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_mf744cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys Mf746cx](https://www.precursorintelligence.com/product/canon/i-sensys_mf746cx) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys Mf746cx Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_mf746cx_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys X C1127i](https://www.precursorintelligence.com/product/canon/i-sensys_x_c1127i) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys X C1127i Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_x_c1127i_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys X C1127if](https://www.precursorintelligence.com/product/canon/i-sensys_x_c1127if) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys X C1127if Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_x_c1127if_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [I-Sensys X C1127p](https://www.precursorintelligence.com/product/canon/i-sensys_x_c1127p) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [I-Sensys X C1127p Firmware](https://www.precursorintelligence.com/product/canon/i-sensys_x_c1127p_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Imageprograf Tc-20](https://www.precursorintelligence.com/product/canon/imageprograf_tc-20) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Imageprograf Tc-20 Firmware](https://www.precursorintelligence.com/product/canon/imageprograf_tc-20_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Imageprograf Tc-20m](https://www.precursorintelligence.com/product/canon/imageprograf_tc-20m) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Imageprograf Tc-20m Firmware](https://www.precursorintelligence.com/product/canon/imageprograf_tc-20m_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp1127c Firmware](https://www.precursorintelligence.com/product/canon/lbp1127c_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp122dw](https://www.precursorintelligence.com/product/canon/lbp122dw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp122dw Firmware](https://www.precursorintelligence.com/product/canon/lbp122dw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp621c](https://www.precursorintelligence.com/product/canon/lbp621c) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp621c Firmware](https://www.precursorintelligence.com/product/canon/lbp621c_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp622c](https://www.precursorintelligence.com/product/canon/lbp622c) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp622c Firmware](https://www.precursorintelligence.com/product/canon/lbp622c_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp622cdw](https://www.precursorintelligence.com/product/canon/lbp622cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp622cdw Firmware](https://www.precursorintelligence.com/product/canon/lbp622cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp623cdw](https://www.precursorintelligence.com/product/canon/lbp623cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp623cdw Firmware](https://www.precursorintelligence.com/product/canon/lbp623cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp661c](https://www.precursorintelligence.com/product/canon/lbp661c) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp661c Firmware](https://www.precursorintelligence.com/product/canon/lbp661c_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp662c](https://www.precursorintelligence.com/product/canon/lbp662c) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp662c Firmware](https://www.precursorintelligence.com/product/canon/lbp662c_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp664c](https://www.precursorintelligence.com/product/canon/lbp664c) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp664c Firmware](https://www.precursorintelligence.com/product/canon/lbp664c_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Lbp664cdw](https://www.precursorintelligence.com/product/canon/lbp664cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Lbp664cdw Firmware](https://www.precursorintelligence.com/product/canon/lbp664cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Maxify Gx3020](https://www.precursorintelligence.com/product/canon/maxify_gx3020) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Maxify Gx3020 Firmware](https://www.precursorintelligence.com/product/canon/maxify_gx3020_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Maxify Gx4020](https://www.precursorintelligence.com/product/canon/maxify_gx4020) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Maxify Gx4020 Firmware](https://www.precursorintelligence.com/product/canon/maxify_gx4020_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf1127c](https://www.precursorintelligence.com/product/canon/mf1127c) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf1127c Firmware](https://www.precursorintelligence.com/product/canon/mf1127c_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf262dw Ii](https://www.precursorintelligence.com/product/canon/mf262dw_ii) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf262dw Ii Firmware](https://www.precursorintelligence.com/product/canon/mf262dw_ii_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf264dw Ii](https://www.precursorintelligence.com/product/canon/mf264dw_ii) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf264dw Ii Firmware](https://www.precursorintelligence.com/product/canon/mf264dw_ii_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf267dw Ii](https://www.precursorintelligence.com/product/canon/mf267dw_ii) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf267dw Ii Firmware](https://www.precursorintelligence.com/product/canon/mf267dw_ii_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf269dw Ii](https://www.precursorintelligence.com/product/canon/mf269dw_ii) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf269dw Ii Firmware](https://www.precursorintelligence.com/product/canon/mf269dw_ii_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf269dw Vp Ii](https://www.precursorintelligence.com/product/canon/mf269dw_vp_ii) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf269dw Vp Ii Firmware](https://www.precursorintelligence.com/product/canon/mf269dw_vp_ii_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf272dw](https://www.precursorintelligence.com/product/canon/mf272dw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf272dw Firmware](https://www.precursorintelligence.com/product/canon/mf272dw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf273dw](https://www.precursorintelligence.com/product/canon/mf273dw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf273dw Firmware](https://www.precursorintelligence.com/product/canon/mf273dw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf275dw](https://www.precursorintelligence.com/product/canon/mf275dw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf275dw Firmware](https://www.precursorintelligence.com/product/canon/mf275dw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf641cw](https://www.precursorintelligence.com/product/canon/mf641cw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf641cw Firmware](https://www.precursorintelligence.com/product/canon/mf641cw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf642cdw](https://www.precursorintelligence.com/product/canon/mf642cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf642cdw Firmware](https://www.precursorintelligence.com/product/canon/mf642cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf644cdw](https://www.precursorintelligence.com/product/canon/mf644cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf644cdw Firmware](https://www.precursorintelligence.com/product/canon/mf644cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf741cdw](https://www.precursorintelligence.com/product/canon/mf741cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf741cdw Firmware](https://www.precursorintelligence.com/product/canon/mf741cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf743cdw](https://www.precursorintelligence.com/product/canon/mf743cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf743cdw Firmware](https://www.precursorintelligence.com/product/canon/mf743cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf745cdw](https://www.precursorintelligence.com/product/canon/mf745cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf745cdw Firmware](https://www.precursorintelligence.com/product/canon/mf745cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Mf746cdw](https://www.precursorintelligence.com/product/canon/mf746cdw) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Mf746cdw Firmware](https://www.precursorintelligence.com/product/canon/mf746cdw_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Pixma G3270](https://www.precursorintelligence.com/product/canon/pixma_g3270) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Pixma G3270 Firmware](https://www.precursorintelligence.com/product/canon/pixma_g3270_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 - [Pixma G4270](https://www.precursorintelligence.com/product/canon/pixma_g4270) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Hardware): version not specified - [Pixma G4270 Firmware](https://www.precursorintelligence.com/product/canon/pixma_g4270_firmware) by [Canon](https://www.precursorintelligence.com/vendors/canon) (Operating system): up to 11.04 ## How do I fix CVE-2023-0858? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the latest update from the vendor. The references list where the vendor has published details. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [canon.jp](https://canon.jp/support/support-info/230414vulnerability-response) - [psirt.canon](https://psirt.canon/advisory-information/cp2023-001/) - [canon-europe.com](https://www.canon-europe.com/support/product-security-latest-news/) - [usa.canon.com](https://www.usa.canon.com/support/canon-product-advisories/Service-Notice-Vulnerabilities-Remediation-Against-Buffer-Overflow) ## Questions ### What is CVE-2023-0858? CVE-2023-0858 is a medium-severity flaw in Lbp1127c from Canon, published on 11 May 2023. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data. ### How serious is CVE-2023-0858? It scores 5.3 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2023-0858 is 23 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2023-0858 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.6%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2023-0858 affect? For Lbp1127c from Canon: version not specified. The record lists 90 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2023-0858? Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2023-0858 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact