Description
In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | openssl-1.1.0, openssl-1.1.0a, openssl-1.1.0b | — |
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 | openssl | 1.1.0c-1 | — |
| Debian 13 | openssl | 1.1.0c-1 | — |
| Debian 12 | openssl | 1.1.0c-1 | — |
Advisories 1
- WID-SEC-2024-0208 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 29, 2024