Vulnerability · Published Jul 18, 2023 · Assigned by mitre
CVE-2021-34121
High 7.8
In plain English
A high-severity security flaw in the htmldoc package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.3%top 72.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An Out of Bounds flaw was discovered in htmodoc 1.9.12 in function parse_tree() in toc.cxx, this possibly leads to memory layout information leaking in the data. This might be used in a chain of vulnerability in order to reach code execution.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | htmldoc | 1.9.13-1 | DEBIAN-CVE-2021-34121 |
| Debian:13 | htmldoc | 1.9.13-1 | DEBIAN-CVE-2021-34121 |
| Debian:14 | htmldoc | 1.9.13-1 | DEBIAN-CVE-2021-34121 |