Access Restriction Bypass Affecting libuser package, versions <0:0.56.13-8.el6_7


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    0.04% (6th percentile)

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  • Snyk ID SNYK-CENTOS6-LIBUSER-2120289
  • published 26 Jul 2021
  • disclosed 23 Jul 2015

How to fix?

Upgrade Centos:6 libuser to version 0:0.56.13-8.el6_7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libuser package and not the libuser package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges.

CVSS Scores

version 3.1
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NVD

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

7.8 high