CVE intelligence and bounded remediation

CVE-2024-0755 — Memory safety bugs present in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6

High CVSS 8.8

Memory safety bugs present in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6. 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 Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

Severity
High
CVSS
8.8 (3.1)
Published
2024-01-23
CISA KEV
Not currently listed
Ecosystem
browser
Weaknesses
CWE-94

Affected products

  • mozilla / firefox
  • mozilla / firefox_esr
  • mozilla / thunderbird
  • debian / debian_linux / 10.0

Matched remediation archetype

Command, code, expression, and template injection

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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