VulnerabilityModified
CVE-2020-14363
An integer overflow vulnerability leading to a double-free was found in libX11.
HIGH 7.8EPSS 0.57%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.57% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190, CWE-416
- Affected
- x.org/libx11 · fedoraproject/fedora
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363Issue Tracking, Third Party Advisory
- https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txtThird Party Advisory
- https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.shExploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF/
- https://lists.x.org/archives/xorg-announce/2020-August/003056.htmlVendor Advisory
- https://usn.ubuntu.com/4487-2/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363Issue Tracking, Third Party Advisory
- https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txtThird Party Advisory
- https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.shExploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF/
- https://lists.x.org/archives/xorg-announce/2020-August/003056.htmlVendor Advisory
- https://usn.ubuntu.com/4487-2/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.