CVE-2021-36978

low-risk
Published 2021-07-20

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.

Do I need to act?

-
0.08% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Qpdf

Affected Vendors

Qpdf Project

References (12)

Patch https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28262
Third Party Advisory https://github.com/google/oss-fuzz-vulns/blob/main/vulns/qpdf/OSV-2020-2245.yaml
Patch https://github.com/qpdf/qpdf/commit/dc92574c10f3e2516ec6445b88c5d584f40df4e5
https://github.com/qpdf/qpdf/issues/492
https://lists.debian.org/debian-lts-announce/2023/08/msg00037.html
https://security.gentoo.org/glsa/202401-20
Patch https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28262
Third Party Advisory https://github.com/google/oss-fuzz-vulns/blob/main/vulns/qpdf/OSV-2020-2245.yaml
Patch https://github.com/qpdf/qpdf/commit/dc92574c10f3e2516ec6445b88c5d584f40df4e5
https://github.com/qpdf/qpdf/issues/492
https://lists.debian.org/debian-lts-announce/2023/08/msg00037.html
https://security.gentoo.org/glsa/202401-20
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal