CVE-2025-24032
Publication date 10 February 2025
Last updated 20 March 2025
Ubuntu priority
Description
PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. Prior to version 0.6.13, if cert_policy is set to none (the default value), then pam_pkcs11 will only check if the user is capable of logging into the token. An attacker may create a different token with the user's public data (e.g. the user's certificate) and a PIN known to the attacker. If no signature with the private key is required, then the attacker may now login as user with that created token. The default to *not* check the private key's signature has been changed with commit commi6638576892b59a99389043c90a1e7dd4d783b921, so that all versions starting with pam_pkcs11-0.6.0 should be affected. As a workaround, in `pam_pkcs11.conf`, set at least `cert_policy = signature;`.
Why is this CVE high priority?
flaw would allow bypassing strong authentication
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| pam-pkcs11 | ||
| 24.04 LTS noble |
Fixed 0.6.12-2ubuntu0.24.04.1
|
|
| 22.04 LTS jammy |
Fixed 0.6.11-4ubuntu0.1
|
|
| 20.04 LTS focal |
Fixed 0.6.11-2ubuntu0.1
|
|
| 18.04 LTS bionic |
Fixed 0.6.9-2ubuntu0.1~esm1
|
|
| 16.04 LTS xenial |
Fixed 0.6.8-4ubuntu0.1~esm1
|
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Related Ubuntu Security Notices (USN)
- USN-7363-1
- PAM-PKCS#11 vulnerabilities
- 20 March 2025