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CVE-2021-36978

Published: 20 July 2021

QPDF 9.x through 9.1.1 and 10.x through 10.0.4 has a heap-based buffer overflow in Pl_ASCII85Decoder::write (called from Pl_AES_PDF::flush and Pl_AES_PDF::finish) when a certain downstream write fails.

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
qpdf
Launchpad, Ubuntu, Debian
focal
Released (9.1.1-1ubuntu0.1)
hirsute Not vulnerable
(10.3.1-1)
jammy Not vulnerable

trusty Does not exist

upstream
Released (10.1.0-1)
xenial
Released (8.0.2-3~16.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (8.0.2-3ubuntu0.1)
impish Not vulnerable

Patches:
upstream: https://github.com/qpdf/qpdf/commit/dc92574c10f3e2516ec6445b88c5d584f40df4e5

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H