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.
problem types: CWE-179 - Incorrect Behavior Order: Early Validation, CWE-1173 Improper Use of Validation Framework
affected:
{
product: gzip, xz-utils
vendor: n/a
versions:
status: affected, version: Fixed in gzip 1.12
}