Vulnerability Description
Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer dereference in print_attribute via a zero length BMPSTRING attribute. print_attribute() sizes the destination buffer for a BMPSTRING attribute from its declared byte length with `Renew(*attribute, length, char)`. A zero length attribute makes that a zero size reallocation, which Perl implements as a free returning NULL, so the buffer pointer becomes NULL, the following `strncpy` copies nothing, and the caller dereferences NULL in the `strlen()` it passes to `newSVpvn()`. A zero length BMPSTRING is even length, so the ASN.1 decoder accepts it and the value reaches this code. The UTF8STRING, OCTET STRING and BIT STRING arms size on `length + 1` or `length * 4 + 1` and are unaffected. Any caller that passes an untrusted PKCS#12 file to info_as_hash() can crash the process. info() prints attribute values directly without sizing a buffer and is unaffected.
Related Weaknesses (CWE)
References
- https://github.com/dsully/perl-crypt-openssl-pkcs12/commit/6cb282d8d8e8ded485955
- https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.98/source/Changes.md
FAQ
What is CVE-2026-17510?
CVE-2026-17510 is a documented vulnerability. Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer dereference in print_attribute via a zero length BMPSTRING attribute. print_attribute() sizes the destination buffer for a BM...
How severe is CVE-2026-17510?
CVSS scoring is not yet available for CVE-2026-17510. Check NVD for updates.
Is there a patch for CVE-2026-17510?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.