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3 vulnerabilities by opencryptoki
CVE-2026-40253 (GCVE-0-2026-40253)
Vulnerability from cvelistv5 – Published: 2026-04-16 22:04 – Updated: 2026-04-17 12:27
VLAI?
Title
openCryptoki: Memory safety vulnerabilities in BER/DER decoders in asn1.c
Summary
openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. In versions 3.26.0 and below, the BER/DER decoding functions in the shared common library (asn1.c) accept a raw pointer but no buffer length parameter, and trust attacker-controlled BER length fields without validating them against actual buffer boundaries. All primitive decoders are affected: ber_decode_INTEGER, ber_decode_SEQUENCE, ber_decode_OCTET_STRING, ber_decode_BIT_STRING, and ber_decode_CHOICE. Additionally, ber_decode_INTEGER can produce integer underflows when the encoded length is zero. An attacker supplying a malformed BER-encoded cryptographic object through PKCS#11 operations such as C_CreateObject or C_UnwrapKey, token loading from disk, or remote backend communication can trigger out-of-bounds reads. This affects all token backends (Soft, ICA, CCA, TPM, EP11, ICSF) since the vulnerable code is in the shared common library. A patch is available thorugh commit ed378f463ef73364c89feb0fc923f4dc867332a3.
Severity ?
6.8 (Medium)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| opencryptoki | opencryptoki |
Affected:
<= 3.26.0
|
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CVE-2026-23893 (GCVE-0-2026-23893)
Vulnerability from cvelistv5 – Published: 2026-01-22 00:01 – Updated: 2026-01-22 21:52
VLAI?
Title
openCryptoki has improper link resolution before file access (link following)
Summary
openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. Versions 2.3.2 and above are vulnerable to symlink-following when running in privileged contexts. A token-group user can redirect file operations to arbitrary filesystem targets by planting symlinks in group-writable token directories, resulting in privilege escalation or data exposure. Token and lock directories are 0770 (group-writable for token users), so any token-group member can plant files and symlinks inside them. When run as root, the base code handling token directory file access, as well as several openCryptoki tools used for administrative purposes, may reset ownership or permissions on existing files inside the token directories. An attacker with token-group membership can exploit the system when an administrator runs a PKCS#11 application or administrative tool that performs chown on files inside the token directory during normal maintenance. This issue is fixed in commit 5e6e4b4, but has not been included in a released version at the time of publication.
Severity ?
6.8 (Medium)
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| opencryptoki | opencryptoki |
Affected:
>= 2.3.2
|
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CVE-2026-22791 (GCVE-0-2026-22791)
Vulnerability from cvelistv5 – Published: 2026-01-13 19:06 – Updated: 2026-01-13 19:44
VLAI?
Title
openCryptoki incorrectly calculates the buffer size in C_WrapKey with CKM_ECDH_AES_KEY_WRAP
Summary
openCryptoki is a PKCS#11 library and tools for Linux and AIX. In 3.25.0 and 3.26.0, there is a heap buffer overflow vulnerability in the CKM_ECDH_AES_KEY_WRAP implementation allows an attacker with local access to cause out-of-bounds writes in the host process by supplying a compressed EC public key and invoking C_WrapKey. This can lead to heap corruption, or denial-of-service.
Severity ?
6.6 (Medium)
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| opencryptoki | opencryptoki |
Affected:
>= 3.25.0, <= 3.26.0
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