Nielsdos

The issue is caused by insufficient length checking when loading phar files, leading to a stack buffer overflow, which can result in memory corruption or remote code execution (RCE). This vulnerability was reportedly exploited by law enforcement agencies in Operation Cronos to compromise the LockBit ransomware group's infrastructure. The group claims that the vulnerability, specifically in PHP version 8.1.2, was used to gain access to their servers. It is estimated that over 2000 individuals and organizations have been affected by LockBit, with the group demanding over $91 million in ransom from American organizations alone. The vulnerability allows for RCE, which can enable attackers to execute arbitrary code on the affected system.

The issue is related to the use of a random value generator with a narrower range of values than it should have when using SOAP HTTP Digest Authentication. 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.

O problema está relacionado à validação incorreta de entradas no PHP, permitindo que invasores da rede e do mesmo site definam um cookie padrão não seguro no navegador da vítima, que é tratado como um cookie ` Host-` ou ` Secure-` pelas aplicações PHP. Isso permite que invasores remotos estabeleçam cookies não seguros.

The issue arises from insufficient input validation in the sapi/cgi/cgi main.c component of the PHP interpreter. This allows remote attackers to execute arbitrary code by placing command-line options in the query string, specifically when the query string lacks an equals sign character. The vulnerability is related to the lack of skipping a certain php getopt for the 'd' case.