Null pointer dereference

2021-03-2515:15:00

PRIOn knowledge base

www.prio-n.com

6.5 Medium

AI Score

Confidence

High

0.005 Low

EPSS

Percentile

76.4%

JSON

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. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

CPENameOperatorVersion
multi-domain_management_firmwareeq80.40.114
multi-domain_management_firmwareeq81.0.114
quantum_security_gateway_firmwareeq80.40.114
quantum_security_gateway_firmwareeq81.0.114
quantum_security_management_firmwareeq80.40.114
quantum_security_management_firmwareeq81.0.114
debian_linuxeq9.0
debian_linuxeq10.0
fedoraeq34
freebsdeq12.2 p1

Name	Operator	Version
multi-domain_management_firmware	eq	80.40.114
multi-domain_management_firmware	eq	81.0.114
quantum_security_gateway_firmware	eq	80.40.114
quantum_security_gateway_firmware	eq	81.0.114
quantum_security_management_firmware	eq	80.40.114
quantum_security_management_firmware	eq	81.0.114
debian_linux	eq	9.0
debian_linux	eq	10.0
fedora	eq	34
freebsd	eq	12.2 p1