high
7
CWE
362
Advisory Published
CVE Published
Updated

CVE-2015-8239: Race Condition

First published: Thu Nov 19 2015(Updated: )

A vulnerability in functionality for adding support of SHA-2 digests along with the command was found. The sudoers plugin performs this digest verification while matching rules, and later independently calls execve() to execute the binary. This results in a race condition if the digest functionality is used as suggested (in fact, the rules are matched before the user is prompted for a password, so there is not negligible time frame to replace the binary from underneath sudo). Versions affected are since 1.8.7. CVE assignment: <a href="http://seclists.org/oss-sec/2015/q4/327">http://seclists.org/oss-sec/2015/q4/327</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Sudo=1.8.8
Sudo=1.8.8-b1
Sudo=1.8.8-b2
Sudo=1.8.8-b3
Sudo=1.8.8-rc1
Sudo=1.8.9
Sudo=1.8.9-b1
Sudo=1.8.9-b2
Sudo=1.8.9-p1
Sudo=1.8.9-p2
Sudo=1.8.9-p3
Sudo=1.8.9-p4
Sudo=1.8.9-p5
Sudo=1.8.9-rc1
Sudo=1.8.9-rc2
Sudo=1.8.10
Sudo=1.8.10-b1
Sudo=1.8.10-b2
Sudo=1.8.10-b3
Sudo=1.8.10-b4
Sudo=1.8.10-p1
Sudo=1.8.10-p2
Sudo=1.8.10-p3
Sudo=1.8.10-rc1
Sudo=1.8.10-rc2
Sudo=1.8.10-rc3
Sudo=1.8.11
Sudo=1.8.11-b1
Sudo=1.8.11-b2
Sudo=1.8.11-b3
Sudo=1.8.11-b4
Sudo=1.8.11-p1
Sudo=1.8.11-p2
Sudo=1.8.11-rc1
Sudo=1.8.11-rc2
Sudo=1.8.12
Sudo=1.8.12-b1
Sudo=1.8.12-b2
Sudo=1.8.12-b3
Sudo=1.8.12-rc1
Sudo=1.8.12-rc2
Sudo=1.8.13
Sudo=1.8.13-b1
Sudo=1.8.13-b2
Sudo=1.8.13-b3
Sudo=1.8.13-b4
Sudo=1.8.13-rc1
Sudo=1.8.13-rc2
Sudo=1.8.14
Sudo=1.8.14-b1
Sudo=1.8.14-b2
Sudo=1.8.14-b3
Sudo=1.8.14-b4
Sudo=1.8.14-p1
Sudo=1.8.14-p2
Sudo=1.8.14-p3
Sudo=1.8.14-rc1
Sudo=1.8.15
Sudo=1.8.15-b1
Sudo=1.8.15-b2
Sudo=1.8.15-b3
Sudo=1.8.15-b4
Sudo=1.8.15-b5
Sudo=1.8.15-rc1
Sudo=1.8.15-rc2
Sudo=1.8.15-rc3

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1283635

Remedy

https://www.sudo.ws/repos/sudo/rev/0cd3cc8fa195

Remedy

https://www.sudo.ws/repos/sudo/rev/24a3d9215c64

Remedy

https://www.sudo.ws/repos/sudo/rev/397722cdd7ec

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-8239?

    CVE-2015-8239 is considered to have a high severity due to its potential exploitation leading to privilege escalation.

  • How do I fix CVE-2015-8239?

    To fix CVE-2015-8239, you should update to a patched version of sudo, ideally version 1.8.10 or later.

  • What versions of sudo are affected by CVE-2015-8239?

    CVE-2015-8239 affects sudo versions 1.8.8 through 1.8.14, including specific build variants.

  • What is the nature of the vulnerability in CVE-2015-8239?

    CVE-2015-8239 involves a race condition in the digest verification process used in the sudoers plugin.

  • Is there a workaround for CVE-2015-8239 if I cannot update immediately?

    A potential workaround is to limit permissions for the affected binaries until an update can be applied.

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