Loop with Unreachable Exit Condition ('Infinite Loop') Affecting tar package, versions <1.29b-1.1+deb9u1


0.0
medium

Snyk CVSS

    Attack Complexity High
    Availability High

    Threat Intelligence

    EPSS 0.04% (6th percentile)
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NVD
4.7 medium
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Red Hat
5.5 medium
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SUSE
5.5 medium

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  • Snyk ID SNYK-DEBIAN9-TAR-312293
  • published 26 Dec 2018
  • disclosed 26 Dec 2018

How to fix?

Upgrade Debian:9 tar to version 1.29b-1.1+deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tar package and not the tar package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).