CVE-2001-0191

Gnuserv vulnerability

CVSS

10.0

EPSS

5.5%

EPSS pct

92th

Exploited

No known

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 vendor

Andynorman

Affected product

Gnuserv

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Weakness type (CWE)

CWE-120 — Classic Buffer Overflow

Published

2001-05-03

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 5.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2001-0191

Confirm whether Andynorman Gnuserv is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2001-0191.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2001-0191

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2001-0191 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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