CVE-2021-35039 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://www.openwall.com/lists/oss-security/2021/07/06/3 https://github.com/torvalds/linux/commit/0c18f29aae7ce3dadd26d8ee3505d07cc982df75 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.14 http://www.openwall.com/lists/oss-security/2021/07/06/3 https://security.netapp.com/advisory/ntap-20210813-0004/ https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c18f29aae7ce3dadd26d8ee3505d07cc982df75

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8