Bug 2379592 (CVE-2025-45582)

Summary: CVE-2025-45582 tar: Tar path traversal
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: gmalinko, janstey, pdelbell, praiskup, rstepani
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A relative path traversal flaw was found in the gnu tar utility. When archives with relative paths are extracted without the ‘--keep-old-files’ (‘-k’), the extraction process may overwrite existing files that the current user has access to. The server may be impacted if these files are critical to the operation of some service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2380006, 2380007    
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Description OSIDB Bzimport 2025-07-11 17:01:11 UTC 
GNU Tar through 1.35 allows file overwrite via directory traversal in crafted TAR archives, with a certain two-step process. First, the victim must extract an archive that contains a ../ symlink to a critical directory. Second, the victim must extract an archive that contains a critical file, specified via a relative pathname that begins with the symlink name and ends with that critical file's name. Here, the extraction follows the symlink and overwrites the critical file. This bypasses the protection mechanism of "Member name contains '..'" that would occur for a single TAR archive that attempted to specify the critical file via a ../ approach. For example, the first archive can contain "x -> ../../../../../home/victim/.ssh" and the second archive can contain x/authorized_keys. This can affect server applications that automatically extract any number of user-supplied TAR archives, and were relying on the blocking of traversal.