Description
sshd in OpenSSH 3.6.1p2 and earlier, when PermitRootLogin is disabled and using PAM keyboard-interactive authentication, does not insert a delay after a root login attempt with the correct password, which makes it easier for remote attackers to use timing differences to determine if the password step of a multi-step authentication is successful, a different vulnerability than CVE-2003-0190.
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 | openssh | 1:3.8.1p1-8.sarge.4 | — |
| Debian 13 | openssh | 1:3.8.1p1-8.sarge.4 | — |
| Debian 12 | openssh | 1:3.8.1p1-8.sarge.4 | — |
Advisories 2
- ICSA-22-349-21 Siemens SCALANCE X-200RNA Switch Devices CISA ICS & IT advisories · Dec 13, 2022
- SSA-412672 SSA-412672: Multiple OpenSSL and OpenSSH Vulnerabilities in SCALANCE X-200RNA Switch Devices before V3.2.7 Siemens ProductCERT · Dec 13, 2022
References
- 20030501 Re: OpenSSH/PAM timing attack allows remote users identification mailing-list
- 20030501 Re: OpenSSH/PAM timing attack allows remote users identification mailing-list
- 7482 vdb-entry
- 20030505 Re: OpenSSH/PAM timing attack allows remote users identification mailing-list
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=248747
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf