Out-of-bounds Write Affecting python3-libxml2 package, versions <0:2.9.7-9.el8_4.2


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    1.69% (88th percentile)

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  • Snyk ID SNYK-RHEL8-PYTHON3LIBXML2-4053270
  • published 26 Jul 2021
  • disclosed 22 Apr 2021

How to fix?

Upgrade RHEL:8 python3-libxml2 to version 0:2.9.7-9.el8_4.2 or higher.
This issue was patched in RHSA-2021:2569.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-libxml2 package and not the python3-libxml2 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.

References

CVSS Scores

version 3.1
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NVD

8.6 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    High
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Red Hat

8.6 high
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SUSE

8.6 high