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CVE-2021-36770

Published: 9 August 2021

Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.

Priority

Medium

CVSS 3 base score: 7.8

Status

Package Release Status
libencode-perl
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(2.96-1)
focal Not vulnerable
(3.02-1)
groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Needed

jammy Needed

trusty Does not exist

upstream Needs triage

xenial Ignored
(out of standard support)
perl
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.26.1-6ubuntu0.5)
focal Not vulnerable
(5.30.0-9ubuntu0.2)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.32.1-3ubuntu2.1)
impish
Released (5.32.1-3ubuntu3)
jammy
Released (5.32.1-3ubuntu3)
trusty Not vulnerable

upstream Needs triage

xenial Not vulnerable

Notes

AuthorNote
mdeslaur
Introduced by change in Encode 3.05 in perl 5.32 and 5.34.

References

Bugs