cve-2024-4603
Vulnerability from cvelistv5
Published
2024-05-16 15:21
Modified
2024-10-14 14:56
Severity ?
Summary
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
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/3559e868e58005d15c6013a0c1fd832e51c73397
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/53ea06486d296b890d565fb971b2764fcd826e7e
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/9c39b3858091c152f52513c066ff2c5a47969f0d
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/da343d0605c826ef197aceedc67e8e04f065f740
openssl-security@openssl.orghttps://www.openssl.org/news/secadv/20240516.txt
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/05/16/2
af854a3a-2127-422b-91ae-364da2661108https://github.com/openssl/openssl/commit/3559e868e58005d15c6013a0c1fd832e51c73397
af854a3a-2127-422b-91ae-364da2661108https://github.com/openssl/openssl/commit/53ea06486d296b890d565fb971b2764fcd826e7e
af854a3a-2127-422b-91ae-364da2661108https://github.com/openssl/openssl/commit/9c39b3858091c152f52513c066ff2c5a47969f0d
af854a3a-2127-422b-91ae-364da2661108https://github.com/openssl/openssl/commit/da343d0605c826ef197aceedc67e8e04f065f740
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240621-0001/
af854a3a-2127-422b-91ae-364da2661108https://www.openssl.org/news/secadv/20240516.txt
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: 3.0.0   ≤
Version: 3.1.0   ≤
Version: 3.2.0   ≤
Version: 3.3.0   ≤
Show details on NVD website

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Checking excessively long DSA keys or parameters may be very\\nslow.\\n\\nImpact summary: Applications that use the functions EVP_PKEY_param_check()\\nor EVP_PKEY_public_check() to check a DSA public key or DSA parameters may\\nexperience long delays. Where the key or parameters that are being checked\\nhave been obtained from an untrusted source this may lead to a Denial of\\nService.\\n\\nThe functions EVP_PKEY_param_check() or EVP_PKEY_public_check() perform\\nvarious checks on DSA parameters. Some of those computations take a long time\\nif the modulus (`p` parameter) is too large.\\n\\nTrying to use a very large modulus is slow and OpenSSL will not allow using\\npublic keys with a modulus which is over 10,000 bits in length for signature\\nverification. However the key and parameter check functions do not limit\\nthe modulus size when performing the checks.\\n\\nAn application that calls EVP_PKEY_param_check() or EVP_PKEY_public_check()\\nand supplies a key or parameters obtained from an untrusted source could be\\nvulnerable to a Denial of Service attack.\\n\\nThese functions are not called by OpenSSL itself on untrusted DSA keys so\\nonly applications that directly call these functions may be vulnerable.\\n\\nAlso vulnerable are the OpenSSL pkey and pkeyparam command line applications\\nwhen using the `-check` option.\\n\\nThe OpenSSL SSL/TLS implementation is not affected by this issue.\\n\\nThe OpenSSL 3.0 and 3.1 FIPS providers are affected by this issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: Checking excessively long DSA keys or parameters may be very\u003cbr\u003eslow.\u003cbr\u003e\u003cbr\u003eImpact summary: Applications that use the functions EVP_PKEY_param_check()\u003cbr\u003eor EVP_PKEY_public_check() to check a DSA public key or DSA parameters may\u003cbr\u003eexperience long delays. 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