CVE-2023-3247
LowCVSS 2.6Exploitation Probability (EPSS)
Low risk45th percentile — higher than 45% of all known CVEs
Summary
In PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, and 8.2.* before 8.2.7, when using SOAP HTTP Digest Authentication, the random value generator was not checked for failure and was using a narrower range of values than it should have. In case of random generator failure, it could lead to a disclosure of 31 bits of uninitialized memory from the client to the server.
Risk Assessment
Disclosure of uninitialized memory may lead to leakage of sensitive information and also make it easier for an attacker to guess the client's nonce, increasing the risk of replay attacks.
Recommendation
It is recommended to update PHP to the latest version to mitigate this vulnerability and to monitor server logs for potential attack attempts.
Original NVD description (English source)
In PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, 8.2.* before 8.2.7 when using SOAP HTTP Digest Authentication, random value generator was not checked for failure, and was using narrower range of values than it should have. In case of random generator failure, it could lead to a disclosure of 31 bits of uninitialized memory from the client to the server, and it also made easier to a malicious server to guess the client's nonce.