The Dirty Pipe Vulnerability — The Dirty Pipe Vulnerability documentation
This is the story of CVE-2022-0847, a vulnerability in the Linux kernel since 5.8 which allows overwriting data in arbitrary read-only files. This leads to privilege escalation because unprivileged processes can inject code into root processes. It is similar to CVE-2016-5195 “Dirty Cow” but is easier to exploit. The vulnerability was fixed in Linux 5.16.11, 5.15.25 and 5.10.102.
Zero Day Initiative — CVE-2024-30043: Abusing URL Parsing Confusion to Exploit XXE on SharePoint Server and Cloud
Yes, the title is right. This blog covers an XML eXternal Entity (XXE) injection vulnerability that I found in SharePoint. The bug was recently patched by Microsoft. In general, XXE vulnerabilities are not very exciting in terms of discovery and related technical aspects. They may sometimes be fun t
TeamCity Major Bug-Fix Release for All Versions: Update Your Server Now | The TeamCity Blog
Our customers’ safety is our utmost priority. In order to protect our customers from any potential security threats, we’ve rolled out major bug-fix releases for several older versions of TeamCity (versions 2022.04 through 2023.11).
Cache Me If You Can: Local Privilege Escalation in Zscaler Client Connector (CVE-2023-41973)
A couple months ago, my colleague Winston Ho and I chained a series of unfortunate bugs into a zero-interaction local privilege escalation in Zscaler Client Connector. This was an interesting journey into Windows RPC caller validation and bypassing several checks, including Authenticode verification. Check out the original Medium blogpost for Winston’s own ZSATrayManager Arbitrary File Deletion (CVE-2023-41969)!
Critical Flaws in Cacti Framework Could Let Attackers Execute Malicious Code
The maintainers of the Cacti open-source network monitoring and fault management framework have addressed a dozen security flaws, including two critical issues that could lead to the execution of arbitrary code.
QNAPping At The Wheel (CVE-2024-27130 and friends)
Infosec is, at it’s heart, all about that data. Obtaining access to it (or disrupting access to it) is in every ransomware gang and APT group’s top-10 to-do-list items, and so it makes sense that our research voyage would, at some point, cross paths with products intended to manage - and safeguard - this precious resource.
PoC exploit released for RCE zero-day in D-Link EXO AX4800 routers
The D-Link EXO AX4800 (DIR-X4860) router is vulnerable to remote unauthenticated command execution that could lead to complete device takeovers by attackers with access to the HNAP port.
WP Automatic WordPress plugin hit by millions of SQL injection attacks
Hackers have started to target a critical severity vulnerability in the WP Automatic plugin for WordPress to create user accounts with administrative privileges and to plant backdoors for long-term access.
As the creator of the world’s first smart home cybersecurity hub, Bitdefender regularly audits popular IoT hardware for vulnerabilities. This research paper is part of a broader program that aims to shed light on the security of the world’s best-sellers in the IoT space. This report covers vulnerabilities discovered while researching the LG WebOS TV operating system.
On September 25, 2022, CVE-2022-41352 was filed for Zimbra Collaboration Suite. The vulnerability is a remote code execution flaw that arises from unsafe usage…
Zimbra Email - Stealing Clear-Text Credentials via Memcache injection
We discovered flaws in Zimbra, an enterprise email solution, that allow attackers to steal credentials of users and gain access to their email accounts.
Exploiting an Unbounded memcpy in Parallels Desktop
This post details the development of a guest-to-host virtualization escape for Parallels Desktop on macOS, as used in our successful Pwn2Own 2021 entry. Give...
At the start of 2022, CrowdStrike Intelligence and CrowdStrike Services investigated an incident in which PROPHET SPIDER exploited CVE-2021-22941 — a remote code execution (RCE) vulnerability impacting Citrix ShareFile Storage Zones Controller — to compromise a Microsoft Internet Information Services (IIS) web server. The adversary exploited the vulnerability to deploy a webshell that enabled the downloading of additional tools. This incident highlights how PROPHET SPIDER continues to evolve their tradecraft while continuing to exploit known web-server vulnerabilities.
The Dirty Pipe Vulnerability — The Dirty Pipe Vulnerability documentation
This is the story of CVE-2022-0847, a vulnerability in the Linux kernel since 5.8 which allows overwriting data in arbitrary read-only files. This leads to privilege escalation because unprivileged processes can inject code into root processes. It is similar to CVE-2016-5195 “Dirty Cow” but is easier to exploit. The vulnerability was fixed in Linux 5.16.11, 5.15.25 and 5.10.102.
As the creator of the world’s first smart home cybersecurity hub, Bitdefender regularly audits popular IoT hardware for vulnerabilities. This research paper is part of a broader program that aims to shed light on the security of the world’s best-sellers in the IoT space. This report covers vulnerabilities discovered while researching the LG WebOS TV operating system.
Over 92,000 exposed D-Link NAS devices have a backdoor account
A threat researcher has disclosed a new arbitrary command injection and hardcoded backdoor flaw in multiple end-of-life D-Link Network Attached Storage (NAS) device models.
Bringing process injection into view(s): exploiting all macOS apps using nib files · Sector 7
In a previous blog post we described a process injection vulnerability affecting all AppKit-based macOS applications. This research was presented at Black Hat USA 2022, DEF CON 30 and Objective by the Sea v5. This vulnerability was actually the second universal process injection vulnerability we reported to Apple, but it was fixed earlier than the first. Because it shared some parts of the exploit chain with the first one, there were a few steps we had to skip in the earlier post and the presentations. Now that the first vulnerability has been fixed in macOS 13.0 (Ventura) and improved in macOS 14.0 (Sonoma), we can detail the first one and thereby fill in the blanks of the previous post. This vulnerability was independently found by Adam Chester and written up here under the name “DirtyNIB”. While the exploit chain demonstrated by Adam shares a lot of similarity to ours, our attacks trigger automatically and do not require a user to click a button, making them a lot more stealthy. Therefore we decided to publish our own version of this write-up as well.
Security Flaw in WP-Members Plugin Leads to Script Injection
Attackers could exploit a high-severity cross-site Scripting (XSS) vulnerability in the WP-Members Membership WordPress plugin to inject arbitrary scripts into web pages, according to an advisory from security firm Defiant.
On September 25, 2022, CVE-2022-41352 was filed for Zimbra Collaboration Suite. The vulnerability is a remote code execution flaw that arises from unsafe usage…
Zimbra Email - Stealing Clear-Text Credentials via Memcache injection
We discovered flaws in Zimbra, an enterprise email solution, that allow attackers to steal credentials of users and gain access to their email accounts.
Exploiting an Unbounded memcpy in Parallels Desktop
This post details the development of a guest-to-host virtualization escape for Parallels Desktop on macOS, as used in our successful Pwn2Own 2021 entry. Give...
At the start of 2022, CrowdStrike Intelligence and CrowdStrike Services investigated an incident in which PROPHET SPIDER exploited CVE-2021-22941 — a remote code execution (RCE) vulnerability impacting Citrix ShareFile Storage Zones Controller — to compromise a Microsoft Internet Information Services (IIS) web server. The adversary exploited the vulnerability to deploy a webshell that enabled the downloading of additional tools. This incident highlights how PROPHET SPIDER continues to evolve their tradecraft while continuing to exploit known web-server vulnerabilities.
The Dirty Pipe Vulnerability — The Dirty Pipe Vulnerability documentation
This is the story of CVE-2022-0847, a vulnerability in the Linux kernel since 5.8 which allows overwriting data in arbitrary read-only files. This leads to privilege escalation because unprivileged processes can inject code into root processes. It is similar to CVE-2016-5195 “Dirty Cow” but is easier to exploit. The vulnerability was fixed in Linux 5.16.11, 5.15.25 and 5.10.102.
Loop DoS: New Denial-of-Service attack targets application-layer protocols
A new Denial-of-Service (DoS) attack targets application-layer protocols that draw on the User Datagram Protocol (UDP) for end-to-end communication. The vulnerability affects both legacy and contemporary protocols. Discovered by Christian Rossow and Yepeng Pan, the attack puts an estimated 300,000 Internet hosts and their networks at risk.
What a Cluster: Local Volumes Vulnerability in Kubernetes
Akamai security researcher Tomer Peled recently discovered a high-severity vulnerability in Kubernetes that was assigned CVE-2023-5528 with a CVSS score of 7.2. The vulnerability allows remote code execution with SYSTEM privileges on all Windows endpoints within a Kubernetes cluster. To exploit this vulnerability, the attacker needs to apply malicious YAML files on the cluster. This vulnerability can lead to full takeover on all Windows nodes in a cluster. This vulnerability can be exploited on default installations of Kubernetes (earlier than version 1.28.4), and was tested against both on-prem deployments and Azure Kubernetes Service. In this blog post, we provide a proof-of-concept YAML file as well as an Open Policy Agent (OPA) rule for blocking this vulnerability.
