Excessive Iteration Affecting openssl-libs package, versions <1:3.0.7-27.el9
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Test your applications- Snyk ID SNYK-ALMALINUX9-OPENSSLLIBS-6827896
- published 9 May 2024
- disclosed 30 Apr 2024
Introduced: 30 Apr 2024
CVE-2023-3817 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9 openssl-libs to version 1:3.0.7-27.el9 or higher.
This issue was patched in ALSA-2024:2447.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl-libs package and not the openssl-libs package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 relevant fixed versions and status.
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 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.
The function DH_check() performs various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter value can also trigger an overly long computation during some of these checks. A correct q value, if present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if q is larger than p.
An application that calls DH_check() and supplies a key or parameters obtained from 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() and EVP_PKEY_param_check().
Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications when 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.
References
- https://errata.almalinux.org/8/ALSA-2023-7877.html
- https://errata.almalinux.org/9/ALSA-2024-2447.html
- https://access.redhat.com/security/cve/CVE-2023-3817
- https://access.redhat.com/errata/RHSA-2023:7877
- https://access.redhat.com/errata/RHSA-2024:2447
- http://seclists.org/fulldisclosure/2023/Jul/43
- http://www.openwall.com/lists/oss-security/2023/07/31/1
- http://www.openwall.com/lists/oss-security/2023/09/22/11
- http://www.openwall.com/lists/oss-security/2023/09/22/9
- http://www.openwall.com/lists/oss-security/2023/11/06/2
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7f
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5
- https://lists.debian.org/debian-lts-announce/2023/08/msg00019.html
- https://security.gentoo.org/glsa/202402-08
- https://security.netapp.com/advisory/ntap-20230818-0014/
- https://security.netapp.com/advisory/ntap-20231027-0008/
- https://security.netapp.com/advisory/ntap-20240621-0006/
- https://www.openssl.org/news/secadv/20230731.txt