Description
The supersede_lease function in memory.c in ISC DHCP (dhcpd) server 2.0pl5 allows remote attackers to cause a denial of service (application crash) via a DHCPDISCOVER packet with a 32 byte client-identifier, which causes the packet to be interpreted as a corrupt uid and causes the server to exit with "corrupt lease uid."
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 3.1 | dhcp | 2.0pl5-19.1sarge2 | DSA-1143-1 |
Advisories 1
- DSA-1143-1 dhcp - programming error Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=380273
- DSA-1143 vendor-advisory
- ADV-2006-3158 vdb-entry
- 21655 third-party-advisory
- 21363 third-party-advisory
- [3.9] 20060825 006: SECURITY FIX: August 25, 2006 vendor-advisory
- 19348 vdb-entry
- 21345 third-party-advisory
- 1016755 vdb-entry