Executive Summary

Informations
Name CVE-2023-5678 First vendor Publication 2023-11-06
Vendor Cve Last vendor Modification 2023-11-30

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Overall CVSS Score 5.3
Base Score 5.3 Environmental Score 5.3
impact SubScore 1.4 Temporal Score 5.3
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact Low
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5678

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-754 Improper Check for Unusual or Exceptional Conditions

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 427

Sources (Detail)

https://security.netapp.com/advisory/ntap-20231130-0010/
Source Url
MISC https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=34efaef6c103d636...
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=710fee740904b629...
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=db925ae2e65d0d92...
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=ddeb4b6c6d527e54...
https://www.openssl.org/news/secadv/20231106.txt

Alert History

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Date Informations
2024-02-02 02:50:57
  • Multiple Updates
2024-02-01 12:31:34
  • Multiple Updates
2023-12-01 00:27:45
  • Multiple Updates
2023-11-21 21:27:41
  • Multiple Updates
2023-11-14 21:27:35
  • Multiple Updates
2023-11-07 21:27:12
  • Multiple Updates
2023-11-07 00:27:26
  • Multiple Updates
2023-11-06 21:27:22
  • First insertion