Vulnerability Details : CVE-2022-2503
Dm-verity is used for extending root-of-trust to root filesystems. LoadPin builds on this property to restrict module/firmware loads to just the trusted root filesystem. Device-mapper table reloads currently allow users with root privileges to switch out the target with an equivalent dm-linear target and bypass verification till reboot. This allows root to bypass LoadPin and can be used to load untrusted and unverified kernel modules and firmware, which implies arbitrary kernel execution and persistence for peripherals that do not verify firmware updates. We recommend upgrading past commit 4caae58406f8ceb741603eee460d79bacca9b1b5
Vulnerability category: BypassGain privilege
Products affected by CVE-2022-2503
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-2503
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-2503
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.9
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N |
0.6
|
5.8
|
Google Inc. | |
|
6.7
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
0.8
|
5.9
|
NIST |
CWE ids for CVE-2022-2503
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
-
The authentication scheme or implementation uses key data elements that are assumed to be immutable, but can be controlled or modified by the attacker.Assigned by: cve-coordination@google.com (Secondary)
References for CVE-2022-2503
-
https://github.com/google/security-research/security/advisories/GHSA-6vq3-w69p-w63m
Linux: LoadPin bypass via dm-verity table reload · Advisory · google/security-research · GitHubExploit;Patch;Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20230214-0005/
August 2022 Linux Kernel 5.18 Vulnerabilities in NetApp Products | NetApp Product Security
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