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CVE-2016-7543

Publication date 19 January 2017

Last updated 24 July 2024

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
bash	17.04 zesty	Not affected
	16.10 yakkety	Fixed 4.3-15ubuntu1.1
	16.04 LTS xenial	Fixed 4.3-14ubuntu1.2
	14.04 LTS trusty	Fixed 4.3-7ubuntu1.7
	12.04 LTS precise	Ignored

Patch details

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

Package	Patch details
bash	Upstream: https://ftp.gnu.org/pub/gnu/bash/bash-4.3-patches/bash43-048

Severity score breakdown

Parameter	Value
Base score	8.4 · High
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3294-1
Bash vulnerabilities
17 May 2017

USN-3294-2
Bash vulnerability
1 August 2017

Other references