CVE-2023-3446

Name
CVE-2023-3446
Description
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. One of those checks confirms that the modulus ('p' parameter) is not too large. Trying to use a very large modulus is slow and OpenSSL will not normally use a modulus which is over 10,000 bits in length. However the DH_check() function checks numerous aspects of the key or parameters that have been supplied. Some of those checks use the supplied modulus value even if it has already been found to be too large. An application that calls DH_check() and supplies a key or parameters obtained from 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() 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.
NVD Severity
unknown
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=fc9867c1e03c22ebf56943be205202e576aabf23
MISC https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=8780a896543a654e757db1b9396383f9d8095528
MISC https://www.openssl.org/news/secadv/20230719.txt
MISC https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9a0a4d3c1e7138915563c0df4fe6a3f9377b839c
MISC https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=1fa20cf2f506113c761777127a38bce5068740eb
MISC http://www.openwall.com/lists/oss-security/2023/07/19/5
MISC http://www.openwall.com/lists/oss-security/2023/07/19/4
MISC http://www.openwall.com/lists/oss-security/2023/07/19/6
MISC http://www.openwall.com/lists/oss-security/2023/07/31/1
MISC https://security.netapp.com/advisory/ntap-20230803-0011/
Mailing List https://lists.debian.org/debian-lts-announce/2023/08/msg00019.html
openssl-security@openssl.org https://security.gentoo.org/glsa/202402-08

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:openssl:openssl:1.0.2:-:*:*:*:*:*:* openssl == None == 1.0.2
cpe:2.3:a:openssl:openssl:3.0.0:-:*:*:*:*:*:* openssl == None == 3.0.0
cpe:2.3:a:openssl:openssl:3.1.1:-:*:*:*:*:*:* openssl == None == 3.1.1
cpe:2.3:a:openssl:openssl:3.1.0:-:*:*:*:*:*:* openssl == None == 3.1.0
cpe:2.3:a:openssl:openssl:1.1.1:-:*:*:*:*:*:* openssl == None == 1.1.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
openssl1.1-compat 3.18-community 1.1.1u-r1 Timo Teras <timo.teras@iki.fi> fixed