system/openssl: CVE-2020-1967: TLS 1.3 SSL_check_chain() NULL pointer dereference
Bugzilla ID | 268 |
Alias(es) | CVE-2020-1967 |
Reporter | Max Rees (sroracle) |
Assignee | Max Rees (sroracle) |
Reported | 2020-04-21 11:45:07 -0500 |
Modified | 2020-05-05 01:19:09 -0500 |
Status | RESOLVED FIXED |
Version | 1.0-RC1 |
Hardware | Adélie Linux / All |
Importance | --- / normal |
URL | https://nvd.nist.gov/vuln/detail/CVE-2020-1967 |
Description
Server or client applications that call the SSL_check_chain() function
during or after a TLS 1.3 handshake may crash due to a NULL pointer
dereference as a result of incorrect handling of the
"signature_algorithms_cert" TLS extension. The crash occurs if an
invalid or unrecognised signature algorithm is received from the peer.
This could be exploited by a malicious peer in a Denial of Service
attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by
this issue. This issue did not affect OpenSSL versions prior to
1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).