CVE-2018-14599: canonical ubuntu_linux Off-by-one Error
CVSS: 9.8v3.1CriticalModified
AliasesALPINE-CVE-2018-14599UBUNTU-CVE-2018-14599DEBIAN-CVE-2018-14599
Published 24-08-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-14599 is a critical (CVSS 9.8) Off-by-one Error vulnerability in canonical ubuntu_linux. EPSS estimates a 4.80% chance of exploitation in the next 30 days, higher than 91.8% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
4.80%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 5Timeline
- 24-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.
CVSS metrics
6 scores · 4 sources · 3 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Critical 9.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
4.80%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
0.00 pp
From 4.80% on 19-09-2026
19-09-202619-10-2026
EPSS score4.80%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat3 products
Debian2 products
- libx11< 2:1.6.6-1
- debian_linuxEOL8.0
Alpine1 product
- libx11< 1.6.6-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04
Fedoraproject1 product
- fedoraEOL28
Ubuntu1 product
- libx11< 2:1.6.2-1ubuntu2.1 | < 2:1.6.3-1ubuntu2.1 | < 2:1.6.4-3ubuntu0.1
X.org1 product
- libx11≤ 1.6.5
7 vendors · 10 products
References
18 links- cgit.freedesktop.org/xorg/lib/libX11/commit/?id=b469da1430cdcee06e31c6251b83aede072a1ff0X Refsource CONFIRMPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.x.org/archives/xorg-announce/2018-August/002916.htmlMailing ListX Refsource MLISTThird Party Advisory