Home/CVE/An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged atta
CVE

CVE-2020-14363

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged atta

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.

HIGH · CVSS 7.8 EPSS 0.0015
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-190Integer Overflow or Wraparound
CWE-190Integer Overflow or Wraparound
CWE-416Use After Free
▤

Affected Products & Versions

2
x.org libx11< 1.6.12
fedoraproject fedoraall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · x11doublefree.shgithub.com
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Sep 2020 · 06:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

12
suse-csafopenSUSE-SU-2024:10918-1
rhsaRHSA-2021:1804Important
suse-csafSUSE-SU-2020:2475-2
suse-csafSUSE-SU-2020:2474-2
usnUSN-4487-2
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363Issue TrackingThird Party Advisory
https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txtThird 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
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