Email Client | Breaking Cybersecurity News | The Hacker News

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a recently disclosed high-severity vulnerability in the Zimbra email suite to its  Known Exploited Vulnerabilities Catalog , citing  evidence of active exploitation . The issue in question is  CVE-2022-27924  (CVSS score: 7.5), a command injection flaw in the platform that could lead to the execution of arbitrary Memcached commands and theft of sensitive information. "Zimbra Collaboration (ZCS) allows an attacker to inject memcached commands into a targeted instance which causes an overwrite of arbitrary cached entries," CISA said. Specifically, the bug relates to a case of insufficient validation of user input that, if successfully exploited, could enable attackers to steal cleartext credentials from users of targeted Zimbra instances. The issue was  disclosed  by SonarSource in June, with  patches  released by Zimbra on May 10, 2022, in versions 8.8.15 P31....

A new high-severity vulnerability has been disclosed in the Zimbra email suite that, if successfully exploited, enables an unauthenticated attacker to steal cleartext passwords of users sans any user interaction. "With the consequent access to the victims' mailboxes, attackers can potentially escalate their access to targeted organizations and gain access to various internal services and steal highly sensitive information," SonarSource  said  in a report shared with The Hacker News. Tracked as  CVE-2022-27924  (CVSS score: 7.5), the issue has been characterized as a case of "Memcached poisoning with unauthenticated request," leading to a scenario where an adversary can inject malicious commands and siphon sensitive information. This is made possible by poisoning the IMAP route cache entries in the Memcached server that's used to look up Zimbra users and forward their HTTP requests to appropriate backend services. Memcached is an in-memory key-value sto...

Security researchers have disclosed as many as 40 different vulnerabilities associated with an opportunistic encryption mechanism in mail clients and servers that could open the door to targeted man-in-the-middle (MitM) attacks, permitting an intruder to forge mailbox content and steal credentials. The now-patched flaws, identified in various STARTTLS implementations, were  detailed  by a group of researchers Damian Poddebniak, Fabian Ising, Hanno Böck, and Sebastian Schinzel at the 30th USENIX Security Symposium. In an Internet-wide scan conducted during the study, 320,000 email servers were found vulnerable to what's called a command injection attack. Some of the popular clients affected by the bugs include Apple Mail, Gmail, Mozilla Thunderbird, Claws Mail, Mutt, Evolution, Exim, Mail.ru, Samsung Email, Yandex, and KMail. The attacks require that the malicious party can tamper connections established between an email client and the email server of a provider and has log...

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