What’s Vulnerable › Vulnerabilities

CVE-2002-0820

• Severity: high (CVSS 7.2 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2002-08-12 · updated 2026-06-16

Description

FreeBSD kernel 4.6 and earlier closes the file descriptors 0, 1, and 2 after they have already been assigned to /dev/null when the descriptors reference procfs or linprocfs, which could allow local users to reuse the file descriptors in a setuid or setgid program to modify critical data and gain privileges.

Affected products

• FreeBSD: 4.6

References

• http://archives.neohapsis.com/archives/vulnwatch/2002-q3/0047.html
• http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&frame=right&th=d429cd2ef1d3a2b7&seekm=ai6c0q%242289%241%40FreeBSD.csie.NCTU.edu.tw#link16
• http://marc.info/?l=bugtraq&m=102979180524452&w=2
• http://archives.neohapsis.com/archives/vulnwatch/2002-q3/0047.html
• http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&frame=right&th=d429cd2ef1d3a2b7&seekm=ai6c0q%242289%241%40FreeBSD.csie.NCTU.edu.tw#link16
• http://marc.info/?l=bugtraq&m=102979180524452&w=2

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