CVE-2019-25051 — objstack in GNU Aspell 0

objstack in GNU Aspell 0.60.8 has a heap-based buffer overflow in acommon::ObjStack::dup_top (called from acommon::StringMap::add and acommon::Config::lookup_list).

01What is this vulnerability?

objstack in GNU Aspell 0.60.8 has a heap-based buffer overflow in acommon::ObjStack::dup_top (called from acommon::StringMap::add and acommon::Config::lookup_list).

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: 2021-07-20T06:46:25.000Z
• Last modified: 2024-08-05T03:00:19.159Z

09References

• github.com — https://github.com/google/oss-fuzz-vulns/blob/main/vulns/aspell/OSV-2020-521.yam…
• github.com — https://github.com/gnuaspell/aspell/commit/0718b375425aad8e54e1150313b862e4c6fd3…
• bugs.chromium.org — https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18462
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2021/07/msg00021.html
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• www.debian.org — https://www.debian.org/security/2021/dsa-4948