CVE-2024-4603 Affecting openssl package, versions <3.0.2-0ubuntu1.17
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Test your applications- Snyk ID SNYK-UBUNTU2204-OPENSSL-6861899
- published 30 May 2024
- disclosed 16 May 2024
Introduced: 16 May 2024
CVE-2024-4603 Open this link in a new tabHow to fix?
Upgrade Ubuntu:22.04 openssl to version 3.0.2-0ubuntu1.17 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu.
See How to fix? for Ubuntu:22.04 relevant fixed versions and status.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2024-4603
- https://github.com/openssl/openssl/commit/3559e868e58005d15c6013a0c1fd832e51c73397
- https://github.com/openssl/openssl/commit/53ea06486d296b890d565fb971b2764fcd826e7e
- https://github.com/openssl/openssl/commit/9c39b3858091c152f52513c066ff2c5a47969f0d
- https://github.com/openssl/openssl/commit/da343d0605c826ef197aceedc67e8e04f065f740
- https://www.openssl.org/news/secadv/20240516.txt
- http://www.openwall.com/lists/oss-security/2024/05/16/2
- https://security.netapp.com/advisory/ntap-20240621-0001/