Security News

This manipulation lets attackers remove or modify messages exchanged through the communication channel, which leads to downgrading the public key algorithms used for user authentication or disabling defenses against keystroke timing attacks in OpenSSH 9.5. "The Terrapin attack exploits weaknesses in the SSH transport layer protocol in combination with newer cryptographic algorithms and encryption modes introduced by OpenSSH over 10 years ago."

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Details have emerged about a now-patched flaw in OpenSSH that could be potentially exploited to run arbitrary commands remotely on compromised hosts under specific conditions."This vulnerability allows a remote attacker to potentially execute arbitrary commands on vulnerable OpenSSH's forwarded ssh-agent," Saeed Abbasi, manager of vulnerability research at Qualys, said in an analysis last week.

Microsoft says Internet-exposed Linux and Internet of Things devices are being hijacked in brute-force attacks as part of a recently observed cryptojacking campaign. After gaining access to a system, the attackers deploy a trojanized OpenSSH package that helps them backdoor the compromised devices and steal SSH credentials to maintain persistence.

The maintainers of OpenSSH have released OpenSSH 9.2 to address a number of security bugs, including a memory safety vulnerability in the OpenSSH server.Tracked as CVE-2023-25136, the shortcoming has been classified as a pre-authentication double free vulnerability that was introduced in version 9.1.

Telnet was remarkably simple and effective: instead of connecting physical wires to make a teletype connection to remote servers, you used a TELetype NETwork connection instead. Basically, the data that would usually flow back and forth over a dedicated serial connection or dial-up phone connection was sent and received over the internet, using a packet-switched TCP network connection instead of a circuit-switched point-to-point link. Sshd: fix a pre-authentication double-free memory fault introduced in OpenSSH 9.1.