The version of openssl installed on the remote host is prior to 1.0.2k-16.165. It is, therefore, affected by a vulnerability as referenced in the ALAS-2023-1891 advisory.

    Issue summary: Generating excessively long X9.42 DH keys or checkingexcessively long X9.42 DH keys or     parameters may be very slow.

    Impact summary: Applications that use the functions DH_generate_key() togenerate an X9.42 DH key may     experience long delays.  Likewise, applicationsthat use DH_check_pub_key(), DH_check_pub_key_ex() or     EVP_PKEY_public_check()to check an X9.42 DH key or X9.42 DH parameters may experience long delays.Where     the key or parameters that are being checked have been obtained froman untrusted source this may lead to a     Denial of Service.

    While DH_check() performs all the necessary checks (as of CVE-2023-3817),DH_check_pub_key() doesn't make     any of these checks, and is thereforevulnerable for excessively large P and Q parameters.

    Likewise, while DH_generate_key() performs a check for an excessively largeP, it doesn't check for an     excessively large Q.

    An application that calls DH_generate_key() or DH_check_pub_key() andsupplies a key or parameters obtained     from an untrusted source could bevulnerable to a Denial of Service attack.

    DH_generate_key() and DH_check_pub_key() are also called by a number ofother OpenSSL functions.  An     application calling any of those otherfunctions may similarly be affected.  The other functions affected     by thisare DH_check_pub_key_ex(), EVP_PKEY_public_check(), and EVP_PKEY_generate().

    Also vulnerable are the OpenSSL pkey command line application when using the-pubcheck option, as well as     the OpenSSL genpkey command line application.

    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-2023-5678)

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

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

Detections

Analytics

Amazon Linux AMI : openssl (ALAS-2023-1891)

medium Nessus Plugin ID 186589

Version 1.3

Version 1.2

Version 1.1

Version 1.0

Version 1.3 Dec 12, 2024, 9:55 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202412120955
Version 1.2 Apr 11, 2024, 4:12 PM IAVM reference Plugin Feed: 202404111612
Version 1.1 Mar 8, 2024, 6:26 PM IAVM reference STIG Severity (set to "I") Plugin Feed: 202403081826
Version 1.0 Dec 6, 2023, 12:08 AM New Plugin Feed: 202312060008