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Deleting a file in Wire doesn’t remove it from servers — and other findings

Files deleted via the Wire interface are not actually removed from the server. Moreover, anyone who knows an asset's UUID can retrieve the encrypted file, even if they aren't part of the original conversation.

Using AFL++ on bug bounty programs: an example with Gnome libsoup

A case study in using AFL++, afl-cov and basic custom harnesses to find a bug in libsoup for a public bug bounty program.

CVE-2024-45844: Privilege escalation in F5 BIG-IP

This article describes the F5 BIG-IP CVE-2024-45844 root cause.

Deep diving into F5 Secure Vault

This article describes in details how the F5 Secure Vault works. Security weaknesses were found during this analysis.

Post-Exploiting an F5 Big-IP: root, and now what?

This article describes multiple post-exploitation techniques specific for F5 BIG-IP. It includes capabilities like intercepting/decrypting TLS traffic or decrypting secrets in the Secure Vault. Detection methods are provided for Blue Teams.

LDAP authentication in Active Directory environments

Understanding the different types of LDAP authentication methods is fundamental to apprehend subjects such as relay attacks or countermeasures. This post introduces them through the lens of Python libraries.

Windows Installer arbitrary content manipulation Elevation of Privilege (CVE-2020-0911)

The Windows Installer accesses the MSI files in C:\Windows\Installer while impersonating the user (and using the impersonated user's device map), and trusts these files to perform elevated/privileged operations such as registry key creation. This can be abused by an unprivileged user to obtain SYSTEM privileges.

Shell in the Ghost: Ghostscript CVE-2023-28879 writeup

This write-up details how CVE-2023-28879 - an RCE in Ghostscript - was found and exploited. Due to the prevalence of Ghostscript in PostScript processing, this vulnerability may be reachable in many applications that process images or PDF files (think ImageMagick, PIL, etc.), making this an important one to patch and look out for.

SANS Christmas Challenge 2022

Yannick's write-up for the 2022 SANS Christmas Challenge .

Authenticating with certificates when PKINIT is not supported

A certificate obtained through Active Directory Certificate Services is usually used to get a TGT or recover the NT hash using PKINIT. But what can we do when it's not possible?