CVE-2023-5678

NameCVE-2023-5678
DescriptionIssue 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1055473

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssl (PTS)jessie, jessie (lts)1.0.1t-1+deb8u21vulnerable
stretch (security)1.1.0l-1~deb9u6vulnerable
stretch (lts), stretch1.1.0l-1~deb9u9vulnerable
buster1.1.1n-0+deb10u3vulnerable
buster (security)1.1.1n-0+deb10u6vulnerable
bullseye1.1.1w-0+deb11u1vulnerable
bullseye (security)1.1.1n-0+deb11u5vulnerable
bookworm (security), bookworm3.0.11-1~deb12u2vulnerable
trixie3.2.1-3fixed
sid3.2.2-1fixed
openssl1.0 (PTS)stretch (security)1.0.2u-1~deb9u7vulnerable
stretch (lts), stretch1.0.2u-1~deb9u9vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensslsource(unstable)3.0.12-21055473
openssl1.0source(unstable)(unfixed)

Notes

[bookworm] - openssl <no-dsa> (Minor issue; can be fixed along with future update)
[bullseye] - openssl <no-dsa> (Minor issue; can be fixed along with future update)
[buster] - openssl <postponed> (Minor issue; can be fixed along with future update)
https://www.openssl.org/news/secadv/20231106.txt
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=db925ae2e65d0d925adef429afc37f75bd1c2017 (for 3.0.y)
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=710fee740904b6290fef0dd5536fbcedbc38ff0c (for 1.1.1y)
[stretch] - openssl <postponed> (Minor issue)
[jessie] - openssl <postponed> (Minor issue)
[stretch] - openssl1.0 <postponed> (Minor issue)

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