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Disclosure Date: December 08, 2020
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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).

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CVSS V3 Severity and Metrics
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5.9 Medium
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General Information


  • debian,
  • fedoraproject,
  • netapp,
  • nodejs,
  • openssl,
  • oracle,
  • siemens,
  • tenable


  • active iq unified manager -,
  • aff a250 firmware -,
  • api gateway,
  • business intelligence,
  • business intelligence,
  • business intelligence,
  • business intelligence,
  • clustered data ontap antivirus connector -,
  • communications cloud native core network function cloud native environment 1.10.0,
  • communications diameter intelligence hub,
  • communications session border controller cz8.2,
  • communications session border controller cz8.3,
  • communications session border controller cz8.4,
  • communications session router cz8.2,
  • communications session router cz8.3,
  • communications session router cz8.4,
  • communications subscriber-aware load balancer cz8.2,
  • communications subscriber-aware load balancer cz8.3,
  • communications subscriber-aware load balancer cz8.4,
  • communications unified session manager scz8.2.5,
  • data ontap -,
  • debian linux 10.0,
  • debian linux 9.0,
  • e-series santricity os controller,
  • ef600a firmware -,
  • enterprise communications broker pcz3.1,
  • enterprise communications broker pcz3.2,
  • enterprise communications broker pcz3.3,
  • enterprise manager base platform,
  • enterprise manager base platform,
  • enterprise manager for storage management,
  • enterprise manager ops center,
  • enterprise session border controller cz8.2,
  • enterprise session border controller cz8.3,
  • enterprise session border controller cz8.4,
  • essbase 21.2,
  • fedora 32,
  • fedora 33,
  • graalvm 19.3.4,
  • graalvm 20.3.0,
  • hci compute node -,
  • hci management node -,
  • hci storage node -,
  • http server,
  • jd edwards enterpriseone tools,
  • jd edwards world security a9.4,
  • log correlation engine,
  • manageability software development kit -,
  • mysql,
  • mysql server,
  • nessus network monitor,
  • node.js,
  • oncommand insight -,
  • oncommand workflow automation -,
  • openssl,
  • peoplesoft enterprise peopletools 8.56,
  • peoplesoft enterprise peopletools 8.57,
  • peoplesoft enterprise peopletools 8.58,
  • plug-in for symantec netbackup -,
  • santricity smi-s provider -,
  • sinec infrastructure network services,
  • snapcenter -,
  • solidfire -



Additional Info

Technical Analysis