CVE-2020-15656

HIGH

Description

JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

References

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1647293

https://usn.ubuntu.com/4443-1/

https://www.mozilla.org/security/advisories/mfsa2020-30/

https://www.mozilla.org/security/advisories/mfsa2020-32/

https://www.mozilla.org/security/advisories/mfsa2020-33/

Details

Source: MITRE

Published: 2020-08-10

Updated: 2020-08-18

Type: CWE-843

Risk Information

CVSS v2.0

Base Score: 9.3

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 8.6

Severity: HIGH

CVSS v3.0

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH