Vulnerabilites related to OpenSC - pam_pkcs11
CVE-2025-24032 (GCVE-0-2025-24032)
Vulnerability from cvelistv5
Published
2025-02-10 15:43
Modified
2025-05-21 15:48
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-287 - Improper Authentication
Summary
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;`.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| OpenSC | pam_pkcs11 |
Version: < 0.6.13 |
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CVE-2025-24031 (GCVE-0-2025-24031)
Vulnerability from cvelistv5
Published
2025-02-10 15:38
Modified
2025-02-10 15:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-476 - NULL Pointer Dereference
Summary
PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. In versions 0.6.12 and prior, the pam_pkcs11 module segfaults when a user presses ctrl-c/ctrl-d when they are asked for a PIN. When a user enters no PIN at all, `pam_get_pwd` will never initialize the password buffer pointer and as such `cleanse` will try to dereference an uninitialized pointer. On my system this pointer happens to have the value 3 most of the time when running sudo and as such it will segfault. The most likely impact to a system affected by this issue is an availability impact due to a daemon that uses PAM crashing. As of time of publication, a patch for the issue is unavailable.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| OpenSC | pam_pkcs11 |
Version: <= 0.6.12 |
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