Out-of-bounds Read Affecting tar package, versions <1.29b-2ubuntu0.4



    Attack Complexity Low
    User Interaction Required
    Availability High

    Threat Intelligence

    EPSS 0.04% (9th percentile)
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5.5 medium
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4.3 medium
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Red Hat
5.5 medium

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  • Snyk ID SNYK-UBUNTU1804-TAR-3261139
  • published 1 Feb 2023
  • disclosed 30 Jan 2023

How to fix?

Upgrade Ubuntu:18.04 tar to version 1.29b-2ubuntu0.4 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 Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.