CVE-2001-0191

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2001-05-03 · updated 2026-06-16
Weakness: CWE-120

Description

gnuserv before 3.12, as shipped with XEmacs, does not properly check the specified length of an X Windows MIT-MAGIC-COOKIE cookie, which allows remote attackers to execute arbitrary commands via a buffer overflow, or brute force authentication by using a short cookie length.

Affected products

Andynorman Gnuserv: before 3.12 — fixed in 3.12

How to fix

Upgrade to a fixed version: Andynorman Gnuserv 3.12. Check the vendor advisory for mitigations.

References

http://archives.neohapsis.com/archives/bugtraq/2001-02/0030.html
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-019.php3
http://www.redhat.com/support/errata/RHSA-2001-010.html
http://www.redhat.com/support/errata/RHSA-2001-011.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/6056
http://archives.neohapsis.com/archives/bugtraq/2001-02/0030.html
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-019.php3
http://www.redhat.com/support/errata/RHSA-2001-010.html
http://www.redhat.com/support/errata/RHSA-2001-011.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/6056

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