CVE-2018-20534

Publication date 28 December 2018

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

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

From the Ubuntu Security Team

It was discovered that libsolv incorrectly handled certain malformed input. An attacker could use this issue to cause libsolv to crash, resulting in a denial of service.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libsolv	23.04 lunar	Fixed 0.6.5-2ubuntu1
	22.10 kinetic	Fixed 0.6.5-2ubuntu1
	22.04 LTS jammy	Fixed 0.6.5-2ubuntu1
	21.10 impish	Fixed 0.6.5-2ubuntu1
	21.04 hirsute	Fixed 0.6.5-2ubuntu1
	20.10 groovy	Fixed 0.6.5-2ubuntu1
	20.04 LTS focal	Fixed 0.6.5-2ubuntu1
	19.10 eoan	Fixed 0.6.5-2ubuntu1
	19.04 disco	Fixed 0.6.5-2ubuntu1
	18.10 cosmic	Fixed 0.6.35-2ubuntu0.18.10.1
	18.04 LTS bionic	Fixed 0.6.30-1ubuntu0.1~esm1
	16.04 LTS xenial	Fixed 0.6.11-1.1ubuntu0.1~esm1
	14.04 LTS trusty	Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libsolv	Upstream: 4830af9

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H