CVE-2021-3449 - log back

CVE-2021-3449 edited at 25 Mar 2021 14:39:42
- Unknown
+ High
- Unknown
+ Remote
- Unknown
+ Denial of service
+ An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack.
+ A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue.
+ All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k.
CVE-2021-3449 created at 25 Mar 2021 14:32:05