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CVE-2021-35039

Good to know:

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Date: July 6, 2021

kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature Verification, aka CID-0c18f29aae7c. Without CONFIG_MODULE_SIG, verification that a kernel module is signed, for loading via init_module, does not occur for a module.sig_enforce=1 command-line argument.

Language: C

Severity Score

Related Resources (11)

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c18f29aae7ce3dadd26d8ee3505d07cc982df75
https://github.com/torvalds/linux/commit/0c18f29aae7ce3dadd26d8ee3505d07cc982df75
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-35039
https://security-tracker.debian.org/tracker/CVE-2021-35039
https://nvd.nist.gov/vuln/detail/CVE-2021-35039
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.14
https://www.openwall.com/lists/oss-security/2021/07/06/3
https://security.netapp.com/advisory/ntap-20210813-0004/
http://www.openwall.com/lists/oss-security/2021/07/06/3
https://www.mend.io/vulnerability-database/CVE-2021-35039

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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