#ssh

One of the key components of a container-based architecture is security.There are many facets to it (just have a look at the list of topics in the official OpenShift documentation here), but some of the most basic requirements are authentication and authorization. In this article, I explain how authentication and authorization work in Kubernetes and Red Hat OpenShift. I cover interactions between the different layers of a Kubernetes ecosystem, including the infrastructure layer, Kubernetes layer, and the containerized applications layer.What is authentication and authorization?In simple terms,

Debian Linux Security Advisory 5750-1 - Support for the "strict kex" SSH extension has been backported to AsyncSSH (a Python implementation of the SSHv2 protocol) as hardening against the Terrapin attack.

Confidential containers are containers deployed within a Trusted Execution Environment (TEE), which allows you to protect your application code and secrets when deployed in untrusted environments. In our previous articles, we introduced the Red Hat OpenShift confidential containers (CoCo) solution and relevant use cases. We demonstrated how components of the CoCo solution, spread across trusted and untrusted environments, including confidential virtual machine (CVM), guest components, TEEs, Confidential compute attestation operator, Trustee agents, and more, work together as part of the soluti

Cybersecurity researchers have discovered a new variant of the Gafgyt botnet that's targeting machines with weak SSH passwords to ultimately mine cryptocurrency on compromised instances using their GPU computational power. This indicates that the "IoT botnet is targeting more robust servers running on cloud native environments," Aqua Security researcher Assaf Morag said in a Wednesday analysis.

### Summary Allocating an untrusted amount of memory allows any unauthenticated user to OOM a russh server. ### Details An SSH packet consists of a 4-byte big-endian length, followed by a byte stream of this length. After parsing and potentially decrypting the 4-byte length, russh allocates enough memory for this bytestream, as a performance optimization to avoid reallocations later. https://github.com/Eugeny/russh/blob/4eaa080e7532662023f75e8fff45b743fe607f8c/russh/src/cipher/mod.rs#L254 But this length is entirely untrusted and can be set to any value by the client, causing this much memory to be allocated, which will cause the process to OOM within a few such requests. RFC 4253 contains an explicit section on packet length limits: https://datatracker.ietf.org/doc/html/rfc4253#section-6.1 > However, implementations SHOULD check that the packet length is reasonable in order for the implementation to avoid denial of service and/or buffer overflow attacks. ### PoC Running the `...

Like many other SSH implementations, Apache MINA SSHD suffered from the issue that is more widely known as CVE-2023-48795. An attacker that can intercept traffic between client and server could drop certain packets from the stream, potentially causing client and server to consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack The mitigations to prevent this type of attack were implemented in Apache MINA SSHD 2.12.0, both client and server side. Users are recommended to upgrade to at least this version. Note that both the client and the server implementation must have mitigations applied against this issue, otherwise the connection may still be affected.

The maintainers of the FreeBSD Project have released security updates to address a high-severity flaw in OpenSSH that attackers could potentially exploit to execute arbitrary code remotely with elevated privileges. The vulnerability, tracked as CVE-2024-7589, carries a CVSS score of 7.4 out of a maximum of 10.0, indicating high severity. "A signal handler in sshd(8) may call a logging function

The Russian government and IT organizations are the target of a new campaign that delivers a number of backdoors and trojans as part of a spear-phishing campaign codenamed EastWind. The attack chains are characterized by the use of RAR archive attachments containing a Windows shortcut (LNK) file that, upon opening, activates the infection sequence, culminating in the deployment of malware such

Open WebUI version 0.1.105 suffers from arbitrary file upload and path traversal vulnerabilities.

Editor.js is a block-style editor with clean JSON output. Versions prior to 2.26.0 are vulnerable to Code Injection via pasted input. The processHTML method passes pasted input into wrapper’s innerHTML. This issue is patched in version 2.26.0.