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No exploitation reportedFix available

CVE-2018-20534

No exploitation reported by the sources we read.

  • Published2018-12-28
  • WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

There is an illegal address access at ext/testcase.c in libsolv.a in libsolv through 0.7.2 that will cause a denial of service. NOTE: third parties dispute this issue stating that the issue affects the test suite and not the underlying library. It cannot be exploited in any real-world application

Timeline

dates in UTC
  1. 2018-12-2816:29CVE publishedNVD

Versions per branch

NVD
Canonical ubuntu linux
BranchAffectedFixed in
18.10= 18.10no fix published
Opensuse libsolv
BranchAffectedFixed in
0.7≤ 0.7.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • createrepo_cRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:0.11.0-3.el8and 7 other packages
  • dnfRed Hat:enterprise_linux:8::baseosall versions · fixed in 0:4.2.7-6.el8and 4 other packages
  • libcompsRed Hat:enterprise_linux:8::baseosall versions · fixed in 0:0.1.11-2.el8and 5 other packages
  • libdnfRed Hat:enterprise_linux:8::baseosall versions · fixed in 0:0.35.1-8.el8and 6 other packages
  • librepoRed Hat:enterprise_linux:8::baseosall versions · fixed in 0:1.10.3-3.el8and 4 other packages
  • librhsmRed Hat:enterprise_linux:8::baseosall versions · fixed in 0:0.0.3-3.el8and 2 other packages
  • libsolvUbuntu:Pro:18.04:LTSall versions · fixed in 0.6.30-1ubuntu0.1~esm1
  • libsolvUbuntu:Pro:16.04:LTSall versions · fixed in 0.6.11-1.1ubuntu0.1~esm1

123 more package ranges on OSV.dev

Vendor advisories

  • CVE-2018-20534 Red Hat Product Security292 products fixed

    libsolv: illegal address access in pool_whatprovides in src/pool.h

  • RHSA-2019:3583 Red Hat Product Security209 products fixed

    Red Hat Security Advisory: yum security, bug fix, and enhancement update

  • RHSA-2019:2290 Red Hat Product Security83 products fixed

    Red Hat Security Advisory: libsolv security and bug fix update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2019:3583 · 209 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2018-12-28
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-qghc-5fvm-f36w

Frequently asked questions

What is CVE-2018-20534?

There is an illegal address access at ext/testcase.c in libsolv.a in libsolv through 0.7.2 that will cause a denial of service. NOTE: third parties dispute this issue stating that the issue affects the test suite and not the underlying library. It cannot be exploited in any real-world application

Is CVE-2018-20534 actively exploited?

Active exploitation of CVE-2018-20534 has not been confirmed. Its EPSS score was 2.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-20534?

CVE-2018-20534 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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