Description
Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference.
X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid->keyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds.
A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| JONASBN | Crypt::OpenSSL::X509 | < 2.1.3 | 2.1.3 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libcrypt-openssl-x509-perl | 2.1.3-1 | — |
| Debian 13 | libcrypt-openssl-x509-perl | No fix yet | — |
| Debian 12 | libcrypt-openssl-x509-perl | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libcrypt-openssl-x509-perl | No fix yet | — |
| Ubuntu 26.04 LTS | libcrypt-openssl-x509-perl | No fix yet | — |
| Ubuntu 24.04 LTS | libcrypt-openssl-x509-perl | No fix yet | — |
| Ubuntu 22.04 LTS | libcrypt-openssl-x509-perl | No fix yet | — |
| Ubuntu 20.04 LTS | libcrypt-openssl-x509-perl | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libcrypt-openssl-x509-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libcrypt-openssl-x509-perl | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | perl-crypt-openssl-x509 | 2.1.3-r0 | — |