# What is CVE-2018-0264? > CVE-2018-0264 is a critical-severity flaw (CVSS 9.6) in Webex Meeting Server from Cisco, published on 2 May 2018. 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 3.0%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2018-0264 ## At a glance - **Verdict:** Fix this soon. Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month. - **Precursor Intelligence risk score:** 54 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes. - **Severity:** Critical (CVSS 9.6 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:** 3.0% (latest exploit-likelihood forecast) - **Published:** 2 May 2018 - **Record last updated:** 9 October 2019 - **Main product:** Webex Meeting Server from Cisco - **Affected products:** 4 ## What is CVE-2018-0264? In plain terms It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can read data, change data and take it offline. ### The official description A vulnerability in the Cisco WebEx Network Recording Player for Advanced Recording Format (ARF) files could allow an unauthenticated, remote attacker to execute arbitrary code on the system of a targeted user. An attacker could exploit this vulnerability by sending the user a link or email attachment with a malicious ARF file and persuading the user to follow the link or open the file. Successful exploitation could allow the attacker to execute arbitrary code on the user's system. This vulnerability affects Cisco WebEx Business Suite meeting sites, Cisco WebEx Meetings sites, Cisco WebEx Meetings Server, and Cisco WebEx ARF players. The following client builds of Cisco WebEx Business Suite (WBS31 and WBS32), Cisco WebEx Meetings, and Cisco WebEx Meetings Server are affected: Cisco WebEx Business Suite (WBS31) client builds prior to T31.23.4, Cisco WebEx Business Suite (WBS32) client builds prior to T32.12, Cisco WebEx Meetings with client builds prior to T32.12, Cisco WebEx Meeting Server builds prior to 3.0 Patch 1. Cisco Bug IDs: CSCvh85410, CSCvh85430, CSCvh85440, CSCvh85442, CSCvh85453, CSCvh85457. ### What kind of flaw is it? - CWE-20: Improper Input Validation ### 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: Yes, a person has to take an action - What an attacker gets: Can read data, change data and take it offline Severity vector: `CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H` ## Is CVE-2018-0264 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 3.0%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 3.0%, 3.0%, 3.0%, 3.0%, 3.0%, 3.0%, 3.0%. ### Timeline - 2 May 2018: Published - 9 October 2019: Record last updated ### How Precursor Intelligence ranks it CVE-2018-0264 scores **54 out of 100 (Medium)**, with the action "Plan remediation". 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-2018-0264? The published record lists 4 products. Versions are as published: "before 3.0" means every version up to, but not including, 3.0. - [Webex Meeting Server](https://www.precursorintelligence.com/product/cisco/webex_meeting_server) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): before 3.0 - [Webex Business Suite 31](https://www.precursorintelligence.com/product/cisco/webex_business_suite_31) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): before t32.12 - [Webex Business Suite 32](https://www.precursorintelligence.com/product/cisco/webex_business_suite_32) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): before t31.23.4 - [Webex Meetings](https://www.precursorintelligence.com/product/cisco/webex_meetings) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): before t32.12 ## How do I fix CVE-2018-0264? 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 update named in the vendor’s advisory. We’ve put the advisory first in the list. 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 - [tools.cisco.com](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-war) (Vendor advisory) - [securityfocus.com](http://www.securityfocus.com/bid/104073) (Third-party advisory, Vulnerability database) ## Questions ### What is CVE-2018-0264? CVE-2018-0264 is a critical-severity flaw in Webex Meeting Server from Cisco, published on 2 May 2018. It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can read data, change data and take it offline. ### How serious is CVE-2018-0264? It scores 9.6 out of 10 on the CVSS severity scale, which is critical. Our risk score for CVE-2018-0264 is 54 out of 100, which is Medium. Its action is "Plan remediation". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month. ### Is CVE-2018-0264 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 3.0%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2018-0264 affect? For Webex Meeting Server from Cisco: before 3.0. The record lists 4 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2018-0264? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2018-0264 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