High severity · published Aug 10, 2020
CVE-2020-15659
Mozilla developers and community members reported memory safety bugs present in Firefox 78 and Firefox ESR 78.0
8.8
CVSS
2.4%
EPSS
No
On KEV
Description
Mozilla developers and community members reported memory safety bugs present in Firefox 78 and Firefox ESR 78.0. 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 < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, 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)2.4% · higher than 84% 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 68.11; 78.0 before 78.1.0 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
TH
Thunderbird · Mozilla
before 68.11; 78.0.1 before 78.1.0 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15659
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15659
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00022.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00032.html
Issue Tracking
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1550133%2C1633880%2C1643613%2C1644839%2C1645835%2C1646006%2C1646787%2C1649347%2C1650811%2C1651678
Patch
https://usn.ubuntu.com/4443-1/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-30/
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