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Published: 22 December 2023

Sudo before 1.9.15 might allow row hammer attacks (for authentication bypass or privilege escalation) because application logic sometimes is based on not equaling an error value (instead of equaling a success value), and because the values do not resist flips of a single bit.


part of the code in the fix commit, in plugins/sudoers/auth/passwd.c,
plugins/sudoers/auth/sudo_auth.c and plugins/sudoers/auth/sudo_auth.h is not built
with Ubuntu as it is using PAM support. for the other part, the code fixed in
plugins/sudoers/lookup.c was added in version 1.9.15. hence not affecting any
Ubuntu releases, and for plugins/sudoers/match.c, part was added in 1.8.21, that
if considered just by itself, it doesn't worth patching.



Cvss 3 Severity Score


Score breakdown


Package Release Status
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not compiled)
focal Not vulnerable
(code not compiled)
jammy Not vulnerable
(code not compiled)
lunar Not vulnerable
(code not compiled)
mantic Not vulnerable
(code not compiled)
trusty Not vulnerable
(code not compiled)
Released (1.9.15p2-2)
xenial Not vulnerable
(code not compiled)

Severity score breakdown

Parameter Value
Base score 7.0
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H