CVE-2022-1271

An arbitrary file write vulnerability was found in GNU gzip's zgrep utility. When zgrep is applied on the attacker's chosen file name (for example, a crafted file name), this can overwrite an attacker's content to an arbitrary attacker-selected file. This flaw occurs due to insufficient validation when processing filenames with two or more newlines where selected content and the target file names are embedded in crafted multi-line file names. This flaw allows a remote, low privileged attacker to force zgrep to write arbitrary files on the system.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gzip	22.04 LTS jammy	Fixed 1.10-4ubuntu4
	21.10 impish	Fixed 1.10-4ubuntu1.1
	20.04 LTS focal	Fixed 1.10-0ubuntu4.1
	18.04 LTS bionic	Fixed 1.6-5ubuntu1.2
	16.04 LTS xenial	Fixed 1.6-4ubuntu1+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 1.6-3ubuntu1+esm1 Ubuntu Pro
xz-utils	22.04 LTS jammy	Fixed 5.2.5-2ubuntu1
	21.10 impish	Fixed 5.2.5-2ubuntu0.1
	20.04 LTS focal	Fixed 5.2.4-1ubuntu1.1
	18.04 LTS bionic	Fixed 5.2.2-1.3ubuntu0.1
	16.04 LTS xenial	Fixed 5.1.1alpha+20120614-2ubuntu2.16.04.1+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 5.1.1alpha+20120614-2ubuntu2.14.04.1+esm1 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
gzip	Upstream: ?id=dc9 Upstream: ?id=d74 Upstream: ?id=c99 Upstream: ?id=0e2 Upstream: ?id=5e1
xz-utils	Upstream: https://tukaani.org/xz/xzgrep-ZDI-CAN-16587.patch

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-5378-1
Gzip vulnerability
13 April 2022

USN-5378-2
XZ Utils vulnerability
13 April 2022

USN-5378-3
XZ Utils vulnerability
13 April 2022

USN-5378-4
Gzip vulnerability
13 April 2022