CVE-2020-25219

Publication date 9 September 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

url::recvline in url.cpp in libproxy 0.4.x through 0.4.15 allows a remote HTTP server to trigger uncontrolled recursion via a response composed of an infinite stream that lacks a newline character. This leads to stack exhaustion.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libproxy	20.04 LTS focal	Fixed 0.4.15-10ubuntu1.1
	18.04 LTS bionic	Fixed 0.4.15-1ubuntu0.1
	16.04 LTS xenial	Fixed 0.4.11-5ubuntu1.1
	14.04 LTS trusty	Not in release

Patch details

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

Package	Patch details
libproxy	Upstream: 836c10b

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-4514-1
libproxy vulnerability
17 September 2020