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CVE-2021-20271

Published: 26 March 2021

A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package, whose signature header was modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity, confidentiality, and system availability.

Notes

AuthorNote
seth-arnold
Only debugedit and librpmio9 binary packages are in main, and
triaged with view to how they are used in the build process as described in
https://bugs.launchpad.net/ubuntu/+source/rpm/+bug/1913871

Priority

Low

Cvss 3 Severity Score

7.0

Score breakdown

Status

Package Release Status
rpm
Launchpad, Ubuntu, Debian
bionic
Released (4.14.1+dfsg1-2ubuntu0.1~esm1)
Available with Ubuntu Pro
focal
Released (4.14.2.1+dfsg1-1ubuntu0.1~esm1)
Available with Ubuntu Pro
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Not vulnerable
(4.17.0+dfsg1-1)
kinetic Not vulnerable
(4.17.0+dfsg1-1)
lunar Not vulnerable
(4.17.0+dfsg1-1)
mantic Not vulnerable
(4.17.0+dfsg1-1)
trusty Needed

upstream
Released (4.17.0+dfsg1-1)
xenial
Released (4.12.0.1+dfsg1-3ubuntu0.1~esm1)
Available with Ubuntu Pro
Binaries built from this source package are in Universe and so are supported by the community.

Severity score breakdown

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