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CVE Record

CVE-2021-45908: An issue was discovered in gif2apng 1.9.

An issue was discovered in gif2apng 1.9. There is a stack-based buffer overflow involving a while loop. An attacker has little influence over the data written to the stack, making it unlikely that the flow of control can be subverted.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

gif2apng 1.9 can overflow a stack buffer while handling GIF data. A malicious or malformed GIF could crash a conversion process. The CVE notes attackers have little control over overwritten data, making takeover unlikely based on available evidence.

Executive priority

Treat this as a targeted hygiene issue, not an emergency, unless gif2apng 1.9 processes user-supplied GIFs in production.

Technical view

CVE-2021-45908 is a stack-based buffer overflow in gif2apng 1.9 involving a while loop. The record does not provide CVSS, CWE, affected CPEs, a fixed version, or detailed patch guidance in the supplied bundle.

Likely exposure

Exposure is likely limited to systems that run gif2apng 1.9, especially automated image-conversion workflows that process untrusted GIF files.

Exploitation context

The source bundle does not show CISA KEV inclusion or any cited claim of active exploitation. The described attacker control is limited, so denial of service is more plausible than reliable code execution from the available evidence.

Researcher notes

Evidence is sparse. The CVE describes memory corruption but explicitly says control-flow subversion is unlikely. No exploit status, CVSS score, CWE mapping, affected CPEs, or fixed release is provided in the supplied sources.

Mitigation direction

  • Identify and remove unnecessary gif2apng 1.9 installations.
  • Check Debian, upstream, or vendor guidance for fixed packages.
  • Avoid processing untrusted GIF files with gif2apng 1.9.
  • Run image conversion in a sandboxed, least-privilege worker.
  • Limit resource access for automated conversion jobs.

Validation and detection

  • Search asset inventory and SBOMs for gif2apng 1.9.
  • Review image-processing pipelines for untrusted GIF input paths.
  • Check package manager records for installed gif2apng versions.
  • Review conversion-worker crash logs for suspicious GIF processing failures.
  • Confirm vendor or distro advisory status before closure.
Prepared
Confidence
medium
Sources
3

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-2021-45908 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
2Source 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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