certfr_avis - CERTFR-2023-AVI-0920

CERTFR-2023-AVI-0920

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilités a été découverte dans OpenSSL. Elle permet à un attaquant de provoquer un déni de service à distance.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Contournement provisoire

OpenSSL versions 3.1, 3.0, 1.1.1 et 1.0.2

La vulnérabilité étant considérée comme ayant un faible impact par l'éditeur, aucun correctif pour cette vulnérabilité ne sera disponible avant les prochaines versions de OpenSSL.

Impacted products

	Vendor	Product	Description

References

Title

Publication Time

CVE-2023-5678 (GCVE-0-2023-5678)

Vulnerability from cvelistv5 – Published: 2023-11-06 15:47 – Updated: 2025-12-02 19:42

Summary

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.

Severity ?

No CVSS data available.

CWE

CWE-606 - Unchecked Input for Loop Condition

Assigner

openssl

References

URL

Tags

	https://www.openssl.org/news/secadv/20231106.txt	vendor-advisory
	https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch
	https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch
	https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch
	https://git.openssl.org/gitweb/?p=openssl.git;a=c…	patch

Impacted products

	Vendor	Product	Version
	OpenSSL	OpenSSL	Affected: 1.0.2 , < 1.0.2zj (custom) Affected: 1.1.1 , < 1.1.1x (custom) Affected: 3.0.0 , < 3.0.13 (semver) Affected: 3.1.0 , < 3.1.5 (semver)

Credits

David Benjamin (Google) Richard Levitte

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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