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CVE-2021-20314

Published: 11 August 2021

Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
libspf2
Launchpad, Ubuntu, Debian
impish Ignored
(end of life)
upstream
Released (1.2.11)
trusty Does not exist

hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
jammy Not vulnerable
(1.2.10-7.1ubuntu1)
lunar Not vulnerable
(1.2.10-7.2build1)
mantic Not vulnerable
(1.2.10-7.2build1)
bionic
Released (1.2.10-7ubuntu0.18.04.1~esm1)
Available with Ubuntu Pro
focal
Released (1.2.10-7+deb9u2build0.20.04.1)
xenial
Released (1.2.10-6ubuntu0.1~esm1)
Available with Ubuntu Pro
Patches:
upstream: https://github.com/shevek/libspf2/commit/c37b7c13c30e225183899364b9f2efdfa85552ef

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H