OSV-2025-291 Use-of-uninitialized-value in Poco::Net::NTLMCredentials::parseChallengeMessage
Not scored
Published
Check this codebase for OSV-2025-291 and fix it if it is affected.
What it is: OSV-2025-291 is a vulnerability in poco, published on 20 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of OSV-2025-291 in the wild and no public exploit code.
Affected packages and fixed versions:
- poco (OSS-Fuzz): affected all versions; no fix listed
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/OSV-2025-291/ (Markdown: https://insights.sbomify.com/OSV-2025-291/index.md)
An attacker can trigger a use-of-uninitialized-value bug in the Poco library's NTLM authentication, potentially leaking sensitive memory contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2025-291?
OSV-2025-291 is a vulnerability in poco, published on 20 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=411466303
Crash type: Use-of-uninitialized-value
Crash state:
Poco::Net::NTLMCredentials::parseChallengeMessage
Poco::Net::HTTPNTLMCredentials::createNTLMMessage
Poco::Net::HTTPNTLMCredentials::authenticate
Which versions are affected by OSV-2025-291?
1 open source package ship an affected version, including poco.
| Package | Affected | Fixed in |
|---|---|---|
poco OSS-Fuzz | All versions | None |
How do I fix OSV-2025-291?
No fix has been published for OSV-2025-291 yet. Limit exposure of the affected software until one is available.
Is OSV-2025-291 being exploited?
There is no known exploitation of OSV-2025-291 in the wild and no public exploit code.