CVE-2026-17510
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
In the Crypt::OpenSSL::PKCS12 library for Perl before version 1.98, there is a NULL pointer dereference vulnerability in the print_attribute function when handling a zero-length BMPSTRING attribute. The zero length causes the buffer to be freed and return NULL, and a subsequent strlen call on that pointer crashes the process.
Risk Assessment
Passing an untrusted PKCS#12 file to info_as_hash() can crash the process, potentially leading to denial of service (DoS).
Recommendation
Upgrade Crypt::OpenSSL::PKCS12 to version 1.98 or later. Also avoid processing untrusted PKCS#12 files without prior validation.
Other vulnerabilities in Crypt::OpenSSL::PKCS12
See all- CVE-2026-9265Critical
Crypt::OpenSSL::PKCS12 versions before 1.96 for Perl allow a heap OOB read in print_attribute for UTF8STRING attributes. The print_attribute() function copies an ASN.1 attribute value into a memory buffer without adding a NUL terminator, leading to unsafe reads of adjacent bytes.
- CVE-2026-8721Critical
Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs. Password parameters in PKCS12.xs are declared char *, which leads to the loss of password length in Perl.
- CVE-2026-8507Critical
Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl have out-of-bounds (OOB) write flaws. When parsing a PKCS12 file with a >= 1 GiB OCTET STRING (or BIT STRING) attribute, a heap out-of-bounds write could be triggered, leading to remote-code-execution potential (RCE) due to a signed integer overflow in the size calculation passed to Renew().
Original NVD description (English source)
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.