Description
Memory leak in ypdb_open in yp_db.c for ypserv before 2.5 in the NIS package 3.9 and earlier allows remote attackers to cause a denial of service (memory consumption) via a large number of requests for a map that does not exist.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nis | 3.9-6.2 | — |
| Debian 13 | nis | 3.9-6.2 | — |
| Debian 12 | nis | 3.9-6.2 | — |
| Debian 3.0 | nis | 3.9-6.1 | DSA-180 |
Advisories 1
- DSA-180 nis - information leak Debian Security (DSA / DLA) · Mar 9, 2026
References
- HPSBTL0210-074 vendor-advisory
- RHSA-2003:229 vendor-advisory
- DSA-180 vendor-advisory
- RHSA-2002:224 vendor-advisory
- MDKSA-2002:078 vendor-advisory
- ypserv-map-memory-leak(10423) vdb-entry
- CLA-2002:539 vendor-advisory
- RHSA-2002:223 vendor-advisory
- 6016 vdb-entry
- 20021028 GLSA: ypserv mailing-list