Description
The (1) elog.c and (2) elogd.c components in elog before 2.5.7 r1558-4 generate different responses depending on whether or not a username is valid, which allows remote attackers to determine valid usernames.
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 | elog | 2.5.7+r1558-4+sarge2 | DSA-967-1 |
Advisories 1
- DSA-967-1 elog - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 16579 vdb-entry
- elog-elog-elogd-user-enumeration(24706) vdb-entry
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=349528
- 18783 third-party-advisory
- DSA-967 vendor-advisory
- http://bugs.debian.org/cgi-bin/bugreport.cgi/0003-r1472-Do-not-distinguish-between-invalid-user-name-and-invalid-password.txt?bug=349528%3Bmsg=15%3Batt=3