Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2023-39804
CVE-2023-39804:
CBL Mariner vulnerability analysis and mitigation
Overview
CVE-2023-39804 affects GNU tar versions before 1.35. The vulnerability was discovered in the handling of extension attributes in PAX archives, which can lead to an application crash in xheader.c (NVD, Red Hat).
Technical details
The vulnerability occurs when extended attributes are processed in PAX archives. The issue specifically relates to the mishandling of extended header prefixes in the xheader.c file. The CVSS v3.1 base score is 6.2 (Medium) according to CISA-ADP with vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (NVD).
Impact
When exploited, this vulnerability can lead to an application crash, resulting in a denial of service condition. The impact is limited to availability with no direct effect on confidentiality or integrity (Red Hat).
Mitigation and workarounds
The primary mitigation is to update to GNU tar version 1.35 or later which contains the fix. For systems that cannot be immediately updated, the recommended workaround is to not process untrusted tar archives (Red Hat).
Additional resources
Source: This report was generated using AI
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