Description
libtac in pam_tacplus through 1.5.1 lacks a check for a failure of RAND_bytes()/RAND_pseudo_bytes(). This could lead to use of a non-random/predictable session_id.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | libpam-tacplus | No fix yet | — |
| Ubuntu 20.04 LTS | libpam-tacplus | No fix yet | — |
| Ubuntu 18.04 LTS | libpam-tacplus | No fix yet | — |
| Ubuntu 16.04 LTS | libpam-tacplus | No fix yet | — |