CVE - CVE-2024-4603

CVE-ID
CVE-2024-4603	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
Issue summary: Checking excessively long DSA keys or parameters may be very slow. Impact summary: Applications that use the functions EVP_PKEY_param_check() or EVP_PKEY_public_check() to check a DSA public key or DSA 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 functions EVP_PKEY_param_check() or EVP_PKEY_public_check() perform various checks on DSA parameters. Some of those computations take a long time if the modulus (`p` parameter) is too large. Trying to use a very large modulus is slow and OpenSSL will not allow using public keys with a modulus which is over 10,000 bits in length for signature verification. However the key and parameter check functions do not limit the modulus size when performing the checks. An application that calls EVP_PKEY_param_check() or EVP_PKEY_public_check() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack. These functions are not called by OpenSSL itself on untrusted DSA keys so only applications that directly call these functions may be vulnerable. Also vulnerable are the OpenSSL pkey 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 affected by this issue.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:3.0.14 git commit URL:https://github.com/openssl/openssl/commit/3559e868e58005d15c6013a0c1fd832e51c73397 MISC:3.1.6 git commit URL:https://github.com/openssl/openssl/commit/9c39b3858091c152f52513c066ff2c5a47969f0d MISC:3.2.2 git commit URL:https://github.com/openssl/openssl/commit/da343d0605c826ef197aceedc67e8e04f065f740 MISC:3.3.1 git commit URL:https://github.com/openssl/openssl/commit/53ea06486d296b890d565fb971b2764fcd826e7e MISC:OpenSSL Advisory URL:https://www.openssl.org/news/secadv/20240516.txt
Assigning CNA
OpenSSL Software Foundation
Date Record Created
20240507	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240507)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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