Description
Unknown vulnerability in the passwd_check function in Shadow 4.0.4.1, and possibly other versions before 4.0.5, allows local users to conduct unauthorized activities when an error from a pam_chauthtok function call is not properly handled.
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 | shadow | 1:4.0.3-35 | — |
| Debian 13 | shadow | 1:4.0.3-35 | — |
| Debian 12 | shadow | 1:4.0.3-35 | — |
| Debian 3.0 | shadow | 20000902-12woody1 | DSA-585-1 |
Advisories 1
- DSA-585-1 shadow - programming error Debian Security (DSA / DLA) · Mar 9, 2026
References
- 13028 third-party-advisory
- DSA-585 vendor-advisory
- CLA-2004:894 vendor-advisory
- shadow-pwdcheck-modify-account(17902) vdb-entry