What’s Vulnerable › Vulnerabilities

CVE-2022-1271

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-31 · updated 2026-10-14
• Weakness: CWE-179

Description

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.

Affected products

• Debian Linux: 10.0
• GNU gzip: before 1.12 — fixed in 1.12
• RedHat Jboss Data Grid: 7.0.0
• tukaani-project xz: before 5.2.5 — fixed in 5.2.5

How to fix

Upgrade to a fixed version: GNU gzip 1.12; tukaani-project xz 5.2.5. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2022-1271
• https://bugzilla.redhat.com/show_bug.cgi?id=2073310
• https://git.tukaani.org/?p=xz.git%3Ba=commit%3Bh=69d1b3fc29677af8ade8dc15dba83f0589cb63d6
• https://lists.gnu.org/r/bug-gzip/2022-04/msg00011.html
• https://security-tracker.debian.org/tracker/CVE-2022-1271
• https://security.gentoo.org/glsa/202209-01
• https://security.netapp.com/advisory/ntap-20220930-0006/
• https://tukaani.org/xz/xzgrep-ZDI-CAN-16587.patch
• https://www.openwall.com/lists/oss-security/2022/04/07/8
• https://access.redhat.com/security/cve/CVE-2022-1271
• https://bugzilla.redhat.com/show_bug.cgi?id=2073310
• https://git.tukaani.org/?p=xz.git%3Ba=commit%3Bh=69d1b3fc29677af8ade8dc15dba83f0589cb63d6

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