CVE-2020-0549
Published: 27 January 2020
Cleanup errors in some data cache evictions for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
From the Ubuntu Security Team
It was discovered that on some Intel processors, data from the most recently evicted modified L1 data cache (L1D) line may be propagated into an unused (invalid) L1D fill buffer. A local attacker could possibly use this to expose sensitive information.
Notes
| Author | Note |
|---|---|
| tyhicks | This issue only affects Intel processors |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
intel-microcode Launchpad, Ubuntu, Debian |
bionic |
Released
(3.20200609.0ubuntu0.18.04.0)
|
| disco |
Ignored
(reached end-of-life)
|
|
| eoan |
Released
(3.20200609.0ubuntu0.19.10.0)
|
|
| focal |
Released
(3.20200609.0ubuntu0.20.04.0)
|
|
| groovy |
Released
(3.20200609.0ubuntu0.20.04.0)
|
|
| trusty |
Released
(3.20200609.0ubuntu0.14.04.0)
|
|
| upstream |
Needed
|
|
| xenial |
Released
(3.20200609.0ubuntu0.16.04.0)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0549
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00329.html
- https://software.intel.com/security-software-guidance/software-guidance/l1d-eviction-sampling
- https://ubuntu.com/security/notices/USN-4385-1
- NVD
- Launchpad
- Debian