Home/CVE/A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in th
CVE

CVE-2020-14346

A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in th

A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in the X server may lead to arbitrary access of memory contents. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

HIGH · CVSS 7.8 EPSS 0.00154
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-191Integer Underflow (Wrap or Wraparound)
CWE-191Integer Underflow (Wrap or Wraparound)
▤

Affected Products & Versions

3
x.org x server< 1.20.9
canonical ubuntu linuxall versions
redhat enterprise linuxall versions
▣

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 NVD15 Sep 2020 · 07:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

14
suse-csafopenSUSE-SU-2024:11525-1
rhsaRHSA-2021:1804Important
usnUSN-4488-2
usnUSN-4488-1
suse-csafopenSUSE-SU-2020:1302-1
🔗

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=1862246Issue TrackingThird Party Advisory
https://lists.x.org/archives/xorg-announce/2020-August/003058.htmlMailing ListPatchVendor Advisory
https://security.gentoo.org/glsa/202012-01Third Party Advisory
https://usn.ubuntu.com/4488-2/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1417/Third Party AdvisoryVDB Entry
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