Use After Free Affecting glibc package, versions <0:2.28-127.el8


Severity

Recommended
medium

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.11% (46th percentile)

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  • Snyk ID SNYK-CENTOS8-GLIBC-2056571
  • published 26 Jul 2021
  • disclosed 17 Jan 2020

How to fix?

Upgrade Centos:8 glibc to version 0:2.28-127.el8 or higher.

NVD Description

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

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

CVSS Scores

version 3.1
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NVD

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

7 high
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SUSE

7 high