medium
5.3
Advisory Published
Updated

F5-K000138242

First published: Wed Jan 17 2024(Updated: )

Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_generate_key() to generate an X9.42 DH key may experience long delays. Likewise, applications that 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 from an 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 therefore vulnerable for excessively large P and Q parameters. Likewise, while DH_generate_key() performs a check for an excessively large P, it doesn't check for an excessively large Q. An application that calls DH_generate_key() or DH_check_pub_key() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack. DH_generate_key() and DH_check_pub_key() are also 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_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.

Affected SoftwareAffected VersionHow to fix
F5 BIG-IP Next (LTM)>=20.0.1<=20.0.2
20.1.0
F5 BIG-IP and BIG-IQ Centralized Management>=17.1.0<=17.1.1
17.1.2
F5 BIG-IP and BIG-IQ Centralized Management>=16.1.0<=16.1.4
F5 BIG-IP and BIG-IQ Centralized Management>=15.1.0<=15.1.10
F5 BIG-IP and BIG-IQ Centralized Management>=8.0.0<=8.3.0
F5 F5OS=1.7.0>=1.5.0<=1.5.1=1.4.0>=1.3.0<=1.3.2
F5 F5OS>=1.6.0<=1.6.2>=1.5.0<=1.5.1
F5 Traffix Systems Signaling Delivery Controller=5.2.0=5.1.0

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Reference Links

Frequently Asked Questions

  • What is the severity of F5-K000138242?

    The severity of F5-K000138242 is moderate due to potential performance degradation in applications using affected DH key functions.

  • How do I fix F5-K000138242?

    To fix F5-K000138242, it is recommended to upgrade to the latest version of the affected F5 products as specified in the advisory.

  • What are the affected products for F5-K000138242?

    F5-K000138242 affects multiple versions of F5 BIG-IP, BIG-IQ Centralized Management, F5OS, and Traffix SDC.

  • What is the impact of F5-K000138242 on performance?

    The impact of F5-K000138242 can lead to excessive delays when generating or checking long X9.42 DH keys.

  • Are any workarounds available for F5-K000138242?

    Currently, no specific workarounds are provided for F5-K000138242, so updating to a fixed version is the best solution.

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