CVE-2018-20721

Publication date 16 January 2019

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a "//[::44.1" address.

From the Ubuntu Security Team

It was discovered that uriparser incorrectly handled certain URIs. An attacker could use this vulnerability to cause a crash or possibly leak sensitive information.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
uriparser	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Fixed 0.8.4-1+deb9u2build0.18.04.1
	16.04 LTS xenial	Fixed 0.8.4-1ubuntu0.16.04.1~esm2 Ubuntu Pro
	14.04 LTS trusty	Fixed 0.7.5-1ubuntu2+esm2 Ubuntu Pro

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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
uriparser	Upstream: cef2502

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H