CVE-2001-0955
CVE-2001-0955 is a high-severity vulnerability in Xfree86 Project X11r6 with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 2.0 base score 7.2)
- EPSS exploit prediction: 0% (36th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Xfree86 Project X11r6
- Published:
- Last modified:
Description
Buffer overflow in fbglyph.c in XFree86 before 4.2.0, related to glyph clipping for large origins, allows attackers to cause a denial of service and possibly gain privileges via a large number of characters, possibly through the web page search form of KDE Konqueror or from an xterm command with a long title.
Frequently asked questions
- What is CVE-2001-0955?
- Buffer overflow in fbglyph.c in XFree86 before 4.2.0, related to glyph clipping for large origins, allows attackers to cause a denial of service and possibly gain privileges via a large number of characters, possibly through the web page search form of KDE Konqueror or from an xterm command with a long title.
- How severe is CVE-2001-0955?
- CVE-2001-0955 has a CVSS 2.0 base score of 7.2, rated high severity.
- Is CVE-2001-0955 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2001-0955?
- CVE-2001-0955 primarily affects Xfree86 Project X11r6. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2001-0955?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2001-0955 published?
- CVE-2001-0955 was published on 2001-09-22 and last updated on 2026-06-16.
References
- http://cvsweb.xfree86.org/cvsweb/xc/programs/Xserver/fb/fbglyph.c
- http://marc.info/?l=bugtraq&m=100776624224549&w=2
- http://marc.info/?l=bugtraq&m=100784290015880&w=2
- http://marc.info/?l=vuln-dev&m=100118958310463&w=2
- http://www.securityfocus.com/bid/3657
- http://www.securityfocus.com/bid/3663
- http://www.xfree86.org/4.2.0/RELNOTES2.html#2
- http://www.xfree86.org/security/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7673
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7683
Affected products (3)
- cpe:2.3:a:xfree86_project:x11r6:4.0:*:*:*:*:*:*:*
- cpe:2.3:a:xfree86_project:x11r6:4.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:xfree86_project:x11r6:4.0.3:*:*:*:*:*:*:*
More vulnerabilities in Xfree86 Project X11r6
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- CVE-2004-0084 — Critical (CVSS 10.0): Buffer overflow in the ReadFontAlias function in XFree86 4.1.0 to 4.3.0, when using the CopyISOLatin1Lowered function,…
- CVE-2004-0083 — Critical (CVSS 10.0): Buffer overflow in ReadFontAlias from dirfile.c of XFree86 4.1.0 through 4.3.0 allows local users and remote attackers…
- CVE-2002-1510 — Critical (CVSS 10.0): xdm, with the authComplain variable set to false, allows arbitrary attackers to connect to the X server if the xdm auth…
- CVE-1999-0241 — Critical (CVSS 10.0): Guessable magic cookies in X Windows allows remote attackers to execute commands, e.g. through xterm.
- CVE-2007-1351 — High (CVSS 8.5): Integer overflow in the bdfReadCharacters function in bdfread.c in (1) X.Org libXfont before 20070403 and (2) freetype…