High severity · published Aug 10, 2020
CVE-2020-15656
JIT optimizations involving the Javascript arguments object could confuse later optimizations
8.8
CVSS
1.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 79.0 · source: NVD
FE
Firefox Esr · Mozilla
before 78.1 · source: NVD
LE
Leap · Opensuse
15.2 · source: NVD
TH
Thunderbird · Mozilla
before 78.1 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15656
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15656
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
Third Party Advisory
https://usn.ubuntu.com/4443-1/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-30/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-32/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-33/
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