What is CVE-2018-3640?A medium-severity flaw in Atom C, explained.
CVE-2018-3640 is a medium-severity flaw (CVSS 5.6) in Atom C from Intel, published on 22 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 7.5%. If you run an affected version, plan in the vendor’s fix.
Published 22 May 2018. Record last updated 24 August 2020. We keep this page's data up to date.
What is CVE-2018-3640? In plain terms.
An attacker has to be already on the device with an ordinary user account, and nobody has to click anything. If it works, the attacker can read data.
Systems with microprocessors utilizing speculative execution and that perform speculative reads of system registers may allow unauthorized disclosure of system parameters to an attacker with local user access via a side-channel analysis, aka Rogue System Register Read (RSRE), Variant 3a.
What kind of flaw is it?
- CWE-203Observable Discrepancy
How an attack on it works
Read straight from its severity rating, translated out of the shorthand.
- Where an attacker can beAlready on the device
- How hard it is to pull offHard: conditions must line up
- Login needed firstAn ordinary user account
- Does someone have to clickNo, nobody has to do anything
- What an attacker getsCan read data
Severity vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Is CVE-2018-3640 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 7.5%. That can change at any time, which is why we keep watching.
Timeline
- Published
- Record last updated
CVE-2018-3640 scores 30. Action: Monitor.
We keep the score of every published flaw up to date as the evidence changes. Four things go into the score, and evidence that criminals are actually using it counts most. In order:
- Evidence it is being exploitedBiggest factor
- How severe it isStrong factor
- How widely exposed it isSmaller factor
- Threat activity around itSmaller factor
85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score.
When CVE-2018-3640 matches software you track, it lands in your list with its score and the reasons behind it.
See your own ranked list →Who is affected by CVE-2018-3640? 199 products.
The published record lists 199 products from 2 vendors. If you run one of these, check your version, then go to the fix below.
- Hardware
Atom C
by Intel
Affected versionsc2308c3308c3338c3508c3538c3558c3708c3750c3758c3808c3830c3850c3858c3950 - Hardware
Xeon E5
by Intel
Affected versions2650l_v42658a_v326582658_v22658_v32658_v4 - Hardware
Xeon E7
by Intel
Affected versions28032820283028502850_v22860 - Hardware
Xeon E3
by Intel
Affected versionse5502e5503e5504e5506e5507e5520 - Hardware
Xeon Gold
by Intel
Affected versions5115851158511885119t8512085120t - Hardware
Atom Z
by Intel
Affected versionsz2420z2460z2480z2520z2560z2580 - Hardware
Xeon Platinum
by Intel
Affected versions81538156815881608160f8160m - Hardware
Xeon Silver
by Intel
Affected versions41084109t4110411241144114t - Hardware
Atom E
by Intel
Affected versionse3805e3815e3825e3826e3827e3845
How do I fix CVE-2018-3640? Four steps.
- Check whether you run itCompare 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.
- Apply the vendor’s fixInstall the update named in the vendor’s advisory. We’ve put the advisories and patch notes first in the list.
- If you can’t patch todayFollow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
- Keep an eye on itTrack 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
22 linksDoes CVE-2018-3640 affect you? We'll keep checking.
Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.
- Tell us what you runPick your software from a list, or let us work it out from your website.
- We match it to every flawOver 400,000 published flaws, checked against your list.
- Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
- Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.
Free plan, no card needed. Nothing to install.
1 new flaw affects software Acme tracks
Systems with microprocessors utilizing speculative execution and that perform speculative reads of system registers may allow unauthorized disclosure of syst...
- Matched to
- Atom C on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
CVE-2018-3640 is a medium-severity flaw in Atom C from Intel, published on 22 May 2018. An attacker has to be already on the device with an ordinary user account, and nobody has to click anything. If it works, the attacker can read data.
It scores 5.6 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2018-3640 is 30 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.
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 7.5%. That can change at any time, which is why we keep watching.
For Atom C from Intel: c2308, c3308, c3338, c3508, c3538, c3558 and 10 more. The record lists 199 products in all, each with its versions, under "Who is affected" on this page.
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.