High severity · published Sep 11, 2020
CVE-2020-14363
An integer overflow vulnerability leading to a double-free was found in libX11
7.8
CVSS
0.6%
EPSS
No
On KEV
Description
An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33 · source: NVD
LI
Libx11 · X.org
before 1.6.12 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-14363
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-14363
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363
Third Party Advisory
https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txt
Exploit
https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.sh
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF/
Vendor Advisory
https://lists.x.org/archives/xorg-announce/2020-August/003056.html
Third Party Advisory
https://usn.ubuntu.com/4487-2/
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