It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-306 advisory.

    Issue summary: The AES-SIV cipher implementation contains a bug that causesit to ignore empty associated     data entries which are unauthenticated asa consequence.

    Impact summary: Applications that use the AES-SIV algorithm and want toauthenticate empty data entries as     associated data can be mislead by removingadding or reordering such empty entries as these are ignored by     the OpenSSLimplementation. We are currently unaware of any such applications.

    The AES-SIV algorithm allows for authentication of multiple associateddata entries along with the     encryption. To authenticate empty data theapplication has to call EVP_EncryptUpdate() (or     EVP_CipherUpdate()) withNULL pointer as the output buffer and 0 as the input buffer length.The AES-SIV     implementation in OpenSSL just returns success for such a callinstead of performing the associated data     authentication operation.The empty data thus will not be authenticated.

    As this issue does not affect non-empty associated data authentication andwe expect it to be rare for an     application to use empty associated dataentries this is qualified as Low severity issue. (CVE-2023-2975)

    Issue summary: Checking excessively long DH keys or parameters may be very slow.

    Impact summary: Applications that use the functions DH_check(), DH_check_ex()or EVP_PKEY_param_check() to     check a DH key or DH parameters may experience longdelays. Where the key or parameters that are being     checked have been obtainedfrom an untrusted source this may lead to a Denial of Service.

    The function DH_check() performs various checks on DH parameters. One of thosechecks confirms that the     modulus ('p' parameter) is not too large. Trying to usea very large modulus is slow and OpenSSL will not     normally use a modulus whichis over 10,000 bits in length.

    However the DH_check() function checks numerous aspects of the key or parametersthat have been supplied.
    Some of those checks use the supplied modulus valueeven if it has already been found to be too large.

    An application that calls DH_check() and supplies a key or parameters obtainedfrom an untrusted source     could be vulernable to a Denial of Service attack.

    The function DH_check() is itself called by a number of other OpenSSL functions.An application calling any     of those other functions may similarly be affected.The other functions affected by this are DH_check_ex()     andEVP_PKEY_param_check().

    Also vulnerable are the OpenSSL dhparam and pkeyparam command line applicationswhen using the '-check'     option.

    The OpenSSL SSL/TLS implementation is not affected by this issue.The OpenSSL 3.0 and 3.1 FIPS providers     are not affected by this issue. (CVE-2023-3446)

    Issue summary: Checking excessively long DH keys or parameters may be very slow.

    Impact summary: Applications that use the functions DH_check(), DH_check_ex()or EVP_PKEY_param_check() to     check a DH key or DH parameters may experience longdelays. Where the key or parameters that are being     checked have been obtainedfrom an untrusted source this may lead to a Denial of Service.

    The function DH_check() performs various checks on DH parameters. After fixingCVE-2023-3446 it was     discovered that a large q parameter value can also triggeran overly long computation during some of these     checks. A correct q value,if present, cannot be larger than the modulus p parameter, thus it isunnecessary     to perform these checks if q is larger than p.

    An application that calls DH_check() and supplies a key or parameters obtainedfrom an untrusted source     could be vulnerable to a Denial of Service attack.

    The function DH_check() is itself called by a number of other OpenSSL functions.An application calling any     of those other functions may similarly be affected.The other functions affected by this are DH_check_ex()     andEVP_PKEY_param_check().

    Also vulnerable are the OpenSSL dhparam and pkeyparam command line applicationswhen using the -check     option.

    The OpenSSL SSL/TLS implementation is not affected by this issue.

    The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue. (CVE-2023-3817)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Amazon Linux 2023 : openssl, openssl-devel, openssl-libs (ALAS2023-2023-306)

critical Nessus Plugin ID 180132

Version 1.2