CVE-2016-8622

Publication date 2 November 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
curl	17.04 zesty	Fixed 7.50.1-1ubuntu2
	16.10 yakkety	Fixed 7.50.1-1ubuntu1.1
	16.04 LTS xenial	Fixed 7.47.0-1ubuntu2.2
	14.04 LTS trusty	Fixed 7.35.0-1ubuntu2.10
	12.04 LTS precise	Fixed 7.22.0-3ubuntu4.17

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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)