Out-of-bounds Read in Htmldoc Project
CVE-2021-34121
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Htmldoc Project — versions 1.9.12
Weakness classification (CWE)
References
- github.com/michaelrsweet/htmldoc/issues/433 (Exploit, Issue Tracking)
- github.com/michaelrsweet/htmldoc/commit/c67bbd8756f015e33e4ba639a40c7f9d8bd9e8ab (Patch)
Frequently asked questions
- What is CVE-2021-34121?
- CVE-2021-34121 is a high-severity vulnerability in Htmldoc Project, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2023-07-18.
- How severe is CVE-2021-34121?
- High severity. CVSS v3 base score is 7.8 out of 10.