CVE-2018-20430 — GNU Libextractor through 1

GNU Libextractor through 1.8 has an out-of-bounds read vulnerability in the function history_extract() in plugins/ole2_extractor.c, related to EXTRACTOR_common_convert_to_utf8 in common/convert.c.

01What is this vulnerability?

GNU Libextractor through 1.8 has an out-of-bounds read vulnerability in the function history_extract() in plugins/ole2_extractor.c, related to EXTRACTOR_common_convert_to_utf8 in common/convert.c.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-12-24T05:00:00.000Z
• Last modified: 2024-08-05T11:58:19.366Z

09References

• lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/12/msg00015.html
• www.debian.org — https://www.debian.org/security/2018/dsa-4361
• gnunet.org — https://gnunet.org/git/libextractor.git/tree/ChangeLog
• www.securityfocus.com — http://www.securityfocus.com/bid/106300
• gnunet.org — https://gnunet.org/git/libextractor.git/commit/?id=b405d707b36e0654900cba78e89f4…
• gnunet.org — https://gnunet.org/bugs/view.php?id=5493