Source: opencryptoki X-Debbugs-CC: [email protected] Severity: important Tags: security
Hi, The following vulnerability was published for opencryptoki. CVE-2026-40253[0]: | 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. https://github.com/opencryptoki/opencryptoki/security/advisories/GHSA-c9cf-6vr4-wfxm Fixed by: https://github.com/opencryptoki/opencryptoki/commit/ed378f463ef73364c89feb0fc923f4dc867332a3 If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-40253 https://www.cve.org/CVERecord?id=CVE-2026-40253 Please adjust the affected versions in the BTS as needed.
