CVE-2025-24031— PAM-PKCS#11 vulnerable to segmentation fault on ctrl-c/ctrl-d when asked for PIN
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I. Basic Information for CVE-2025-24031
Vulnerability Information
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Vulnerability Title
PAM-PKCS#11 vulnerable to segmentation fault on ctrl-c/ctrl-d when asked for PIN
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
PAM-PKCS#11 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PAM-PKCS#11是OpenSC开源的一个登录模块。 PAM-PKCS#11 0.6.12及之前版本存在代码问题漏洞，该漏洞源于未正确处理用户取消输入PIN操作，导致段错误，可能导致使用PAM的守护进程崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| OpenSC | pam_pkcs11 | <= 0.6.12 | - |
II. Public POCs for CVE-2025-24031
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same vendor: OpenSC
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OpenSC: `sc_compacttlv_find_tag` can return out-of-bounds po - CVE-2025-66037
OpenSC: Out of Bounds vulnerability - CVE-2025-49010
OpenSC: Stack-buffer-overflow WRITE in GET RESPONSE
Same weakness: CWE-476
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V. Comments for CVE-2025-24031
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