CVE-2019-9793

Advisory lineage Upstream: 0 Downstream: 25
Modified
Published: 26 Apr 2019, 16:13
Last modified:04 Aug 2024, 22:01

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
v3.0 (nvd)
EPSS Score
0.4% LOW
0% probability -0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Apr 2019, 16:13
Published
Vulnerability first disclosed
04 Aug 2024, 22:01
Last Modified
Vulnerability information updated

Description

A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have explicitly disabled Spectre mitigations. *Note: Spectre mitigations are currently enabled for all users by default settings.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

CVSS Metrics

  • v3.0•MEDIUM•Score: 5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.40%• Percentile: 61%

Techniques & Countermeasures

  • CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

    The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Affected Systems

  • Unknown•Firefox

    < 66.0 | ≥ unspecified, < 66

  • mozilla•firefox_esr

    < 60.6 | ≥ unspecified, < 60.6

  • mozilla•thunderbird

    < 60.6 | ≥ unspecified, < 60.6

References (6)