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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-1271
• 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;a=commit;h=69d1b3fc29677af8ade8dc15dba83f0589cb63d6
• https://lists.gnu.org/r/bug-gzip/2022-04/msg00011.html
• https://security-tracker.debian.org/tracker/CVE-2022-1271
• https://tukaani.org/xz/xzgrep-ZDI-CAN-16587.patch
• https://www.openwall.com/lists/oss-security/2022/04/07/8
• https://security.gentoo.org/glsa/202209-01
• https://security.netapp.com/advisory/ntap-20220930-0006/