Deserialization Vulnerability | Breaking Cybersecurity News | The Hacker News

Oracle has released an out-of-band emergency software update to patch a newly discovered critical vulnerability in the WebLogic Server. According to Oracle, the vulnerability—which can be identified as CVE-2019-2729 and has a CVSS score of 9.8 out of 10—is already being exploited in the wild by an unnamed group of attackers. Oracle WebLogic is a Java-based multi-tier enterprise application server that allows businesses to quickly deploy new products and services on the cloud, which is popular across both, cloud environment and conventional environments. The reported vulnerability is a deserialization issue via XMLDecoder in Oracle WebLogic Server Web Services that could allow unauthorized remote attackers to execute arbitrary code on the targeted servers and take control over them. "This remote code execution vulnerability is remotely exploitable without authentication, i.e., may be exploited over a network without the need for a username and password," the advisor...

Sam Thomas, a security researcher from Secarma, has discovered a new exploitation technique that could make it easier for hackers to trigger critical deserialization vulnerabilities in PHP programming language using previously low-risk considered functions. The new technique leaves hundreds of thousands of web applications open to remote code execution attacks, including websites powered by some popular content management systems like WordPress and Typo3. PHP unserialization or object injection vulnerabilities were initially documented in 2009, which could allow an attacker to perform different kinds of attacks by supplying malicious inputs to the unserialize() PHP function. If you are unaware, serialization is the process of converting data objects into a plain string, and unserialize function help program recreate an object back from a string. Thomas found that an attacker can use low-risk functions against Phar archives to trigger deserialization attack without requiring...