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CVE-2019-25051: objstack in GNU Aspell 0.60.8 has a heap-based buffer overflow in acommon::ObjStack::dup_top (called from a...

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).

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

GNU Aspell 0.60.8 has a heap buffer overflow in internal spellchecker code. If a vulnerable Aspell path processes crafted input, it may crash or corrupt memory. The provided sources show upstream and Linux distribution fixes, but do not show active exploitation or a CVSS score.

Executive priority

Prioritize normal security patching for internet-facing or document-processing environments using Aspell. Escalate if Aspell handles untrusted content at scale. Current sources do not justify emergency KEV-style response.

Technical view

The flaw is in objstack acommon::ObjStack::dup_top, reachable from acommon::StringMap::add and acommon::Config::lookup_list. OSS-Fuzz tracked the issue, and an upstream Aspell commit plus Debian and Fedora advisories document remediation. The source bundle does not provide CWE, CVSS, or exploit details.

Likely exposure

Exposure is most likely on systems, containers, or applications that include GNU Aspell 0.60.8 or vulnerable distro packages. Risk depends on whether untrusted content can reach Aspell configuration, dictionary, or spellchecking paths.

Exploitation context

The source bundle marks CISA KEV as false and provides no evidence of active exploitation. The issue was found through OSS-Fuzz. Treat exploitation status as unconfirmed, not actively exploited, based on the provided evidence.

Researcher notes

The affected surface is an internal heap overflow in ObjStack duplication logic. Public evidence identifies the call path and fix references, but not practical exploitability, impact class, or affected downstream package ranges beyond vendor advisories.

Mitigation direction

  • Update GNU Aspell through the relevant OS or distribution security channel.
  • Apply Debian DSA-4948 or DLA-2720-1 where applicable.
  • Apply Fedora advisory FEDORA-2021-69de7c7ca4 where applicable.
  • Check upstream Aspell guidance and downstream package changelogs for fixed builds.
  • Reduce untrusted input paths into Aspell where practical until patched.

Validation and detection

  • Inventory hosts, containers, and build images for GNU Aspell packages.
  • Confirm deployed versions are not GNU Aspell 0.60.8 or vulnerable downstream builds.
  • Map Debian and Fedora systems to the cited security advisories.
  • Review applications that invoke Aspell on user-controlled content.
  • Check vulnerability scanners for CVE-2019-25051 coverage and package-level evidence.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2019-25051 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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