CVE-2021-20308

Integer overflow in the htmldoc 1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service that is similar to CVE-2017-9181.

Affected

htmldoc

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

2.48% chance of exploitation in the next 30 days, 84th percentile

Published

2021-04-05

Updated

2024-08-03

Proof-of-concept exploits (1)

• michaelrsweet/htmldoc/issues/423252★ · 2026-09-07

Security advisories

• https://bugzilla.redhat.com/show_bug.cgi?id=1946289
• https://lists.debian.org/debian-lts-announce/2021/07/msg00000.html

References

• CVE Record
• NVD entry

Related

• CVE-2021-23158
• CVE-2021-23165
• CVE-2021-23180
• CVE-2021-23191
• CVE-2021-23206
• CVE-2021-26259