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No exploitation reportedFix available

CVE-2018-20533

No exploitation reported by the sources we read.

  • Published2018-12-28
  • WeaknessCWE-476

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 a NULL pointer dereference at ext/testcase.c (function testcase_str2dep_complex) in libsolvext.a in libsolv through 0.7.2 that will cause a denial of service.

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

  • 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
  • libsolvSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 0.6.36-2.30.1
  • libsolvSUSE:OpenStack Cloud Crowbar 8all versions · fixed in 0.6.36-2.27.19.8
  • libsolvSUSE:OpenStack Cloud Crowbar 8all versions · fixed in 0.6.36-2.30.1
  • libsolvSUSE:OpenStack Cloud 9all versions · fixed in 0.6.36-2.30.1
  • libsolvSUSE:OpenStack Cloud 8all versions · fixed in 0.6.36-2.16.2
  • libsolvSUSE:OpenStack Cloud 8all versions · fixed in 0.6.36-2.27.19.8

114 more package ranges on OSV.dev

Vendor advisories

  • CVE-2018-20533 Red Hat Product Security296 products fixed

    libsolv: NULL pointer dereference in function testcase_str2dep_complex

  • 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-2019:2290 · 83 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-92g5-g77x-q2f8

Frequently asked questions

What is CVE-2018-20533?

There is a NULL pointer dereference at ext/testcase.c (function testcase_str2dep_complex) in libsolvext.a in libsolv through 0.7.2 that will cause a denial of service.

Is CVE-2018-20533 actively exploited?

Active exploitation of CVE-2018-20533 has not been confirmed. Its EPSS score was 2.1% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-20533?

CVE-2018-20533 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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Sources for this record