CVE-1999-1021

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: 1992-12-30 · updated 2026-06-16

Description

NFS on SunOS 4.1 through 4.1.2 ignores the high order 16 bits in a 32 bit UID, which allows a local user to gain root access if the lower 16 bits are set to 0, as fixed by the NFS jumbo patch upgrade.

Affected products

Sunos: 4.1, 4.1.1, 4.1.2

References

http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/117&type=0&nav=sec.sba
http://www.cert.org/advisories/CA-1992-15.html
http://www.securityfocus.com/bid/47
https://exchange.xforce.ibmcloud.com/vulnerabilities/82
http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/117&type=0&nav=sec.sba
http://www.cert.org/advisories/CA-1992-15.html
http://www.securityfocus.com/bid/47
https://exchange.xforce.ibmcloud.com/vulnerabilities/82

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