CVE-1999-1021 json
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 1…
published 1992-12-30 33 y ago modified 2026-06-16 4 mo ago also EUVD-1999-1002
- cvss
- 7.2
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
References
-
sunsolve.sun.com
/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/117&type=0&nav=sec.sba
vendor-advisory, patch
-
cert.org
/advisories/CA-1992-15.html
third-party-advisory, patch, us-government-resource
-
securityfocus.com
/bid/47
vdb-entry, patch, vendor-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/82
vdb-entry
Sources
- CVE List CVE-1999-1021
- NVD CVE-1999-1021
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.