CVE-2020-1971

The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. OpenSSL itself uses the GENERAL_NAME_cmp function for two purposes: 1) Comparing CRL distribution point names between an available CRL and a CRL distribution point embedded in an X509 certificate 2) When verifying that a timestamp response token signer matches the timestamp authority name (exposed via the API functions TS_RESP_verify_response and TS_RESP_verify_token) If an attacker can control both items being compared then that attacker could trigger a crash. For example if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then this may occur. Note that some applications automatically download CRLs based on a URL embedded in a certificate. This checking happens prior to the signatures on the certificate and CRL being verified. OpenSSL's s_server, s_client and verify tools have support for the "-crl_download" option which implements automatic CRL downloading and this attack has been demonstrated to work against those tools. Note that an unrelated bug means that affected versions of OpenSSL cannot parse or construct correct encodings of EDIPARTYNAME. However it is possible to construct a malformed EDIPARTYNAME that OpenSSL's parser will accept and hence trigger this attack. All OpenSSL 1.1.1 and 1.0.2 versions are affected by this issue. Other OpenSSL releases are out of support and have not been checked. Fixed in OpenSSL 1.1.1i (Affected 1.1.1-1.1.1h). Fixed in OpenSSL 1.0.2x (Affected 1.0.2-1.0.2w).

• openssl openssl (>= 1.0.2 < 1.0.2x) • openssl openssl (>= 1.1.1 < 1.1.1i) • debian debian linux 9.0 • debian debian linux 10.0 • fedoraproject fedora 32 • fedoraproject fedora 33 • oracle api gateway 11.1.2.4.0 • oracle business intelligence 5.5.0.0.0 • oracle business intelligence 5.9.0.0.0 • oracle business intelligence 12.2.1.3.0 • oracle business intelligence 12.2.1.4.0 • oracle communications cloud native core network function cloud native environment 1.10.0 • oracle communications diameter intelligence hub (>= 8.0.0 <= 8.1.0) • oracle communications diameter intelligence hub (>= 8.2.0 <= 8.2.3) • oracle communications session border controller cz8.2 • oracle communications session border controller cz8.3 • oracle communications session border controller cz8.4 • oracle communications session router cz8.2 • oracle communications session router cz8.3 • oracle communications session router cz8.4 • oracle communications subscriber-aware load balancer cz8.2 • oracle communications subscriber-aware load balancer cz8.3 • oracle communications subscriber-aware load balancer cz8.4 • oracle communications unified session manager scz8.2.5 • oracle enterprise communications broker pcz3.1 • oracle enterprise communications broker pcz3.2 • oracle enterprise communications broker pcz3.3 • oracle enterprise manager base platform 13.3.0.0 • oracle enterprise manager base platform 13.4.0.0 • oracle enterprise manager for storage management 13.4.0.0 • oracle enterprise manager ops center 12.4.0.0 • oracle enterprise session border controller cz8.2 • oracle enterprise session border controller cz8.3 • oracle enterprise session border controller cz8.4 • oracle essbase 21.2 • oracle graalvm 19.3.4 • oracle graalvm 20.3.0 • oracle http server 12.2.1.4.0 • oracle jd edwards enterpriseone tools (< 9.2.5.3) • oracle jd edwards world security a9.4 • oracle mysql (<= 8.0.22) • oracle mysql server (<= 5.7.32) • oracle mysql server (>= 8.0.15 <= 8.0.22) • oracle peoplesoft enterprise peopletools 8.56 • oracle peoplesoft enterprise peopletools 8.57 • oracle peoplesoft enterprise peopletools 8.58 • netapp active iq unified manager • netapp clustered data ontap antivirus connector • netapp data ontap • netapp e-series santricity os controller (>= 11.0.0 <= 11.60.3) • netapp hci management node • netapp manageability software development kit • netapp oncommand insight • netapp oncommand workflow automation • netapp plug-in for symantec netbackup • netapp santricity smi-s provider • netapp snapcenter • netapp solidfire • netapp hci compute node • netapp hci storage node … and 12 more