CVE-2016-5421

Publication date 3 August 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
curl	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Fixed 7.47.0-1ubuntu2.1
	14.04 LTS trusty	Fixed 7.35.0-1ubuntu2.8
	12.04 LTS precise	Not affected

Notes

sbeattie

Affected versions: libcurl 7.32.0 to and including 7.50.0

Patch details

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

Package	Patch details
curl	Upstream: https://curl.haxx.se/CVE-2016-5421.patch

Severity score breakdown

Parameter	Value
Base score	8.1 · High
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3048-1
curl vulnerabilities
8 August 2016