Description
sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password.
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 24.04 LTS | sssd +3 | No fix yet | — |
| Ubuntu 22.04 LTS | sssd +4 | No fix yet | — |
| Ubuntu 20.04 LTS | dietlibc +2 | No fix yet | — |
| Ubuntu 18.04 LTS | dietlibc +2 | No fix yet | — |
| Ubuntu 16.04 LTS | dietlibc +2 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | syslinux | No fix yet | — |
| Ubuntu Pro 20.04 LTS | sssd +2 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | sssd +2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | sssd +2 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | eglibc +1 | No fix yet | — |