How Trellix Helix detects AS-REP Roasting in Active Directory

How Trellix Helix detects AS-REP Roasting in Active Directory By Adithya Chandra and Maulik Maheta · November 13, 2025 Executive Summary Adversaries use AS-REP Roasting to extract and crack password hashes from Active Directory AD accounts with Kerberos preauthentication disabled, a...

EUVD-2015-2784

Malware in sbrugna...

ksmbd: fix null pointer dereference in alloc_preauth_hash()

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ipTIME NAS 安全漏洞

ipTIME NAS is a wireless router product from the Korean company ipTIME that provides NAS network attached storage. A security vulnerability exists in ipTIME NAS version v1.5.04, which stems from improper use of the strcpy function in the upload.cgi module, which could lead to a pre-authentication...

CVE-2009-3096

Multiple unspecified vulnerabilities in HP Performance Insight 5.3 allow remote attackers to have an unknown impact, related to 1 a "Remote exploit" on Windows platforms, and 2 a "Remote preauthentication exploit" on the Windows Server 2003 SP2 platform, as demonstrated by certain modules in...

Invalid login error is show when FAS is enabled on Rocky Linux 9.2

You deploy Rocky Linux 9.x FAS is configured and works fine on other OS like Windows, Ubuntu Issue is seen only with RHEL 9.x or Rocky Linux 9.x Invalid login prompt is thrown. Preauthentication errors are noticed in ctxkrb debug tool when installed for debug purposes on the Linux VDA...

CVE-2023-24030

An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0 and 8.8.15. To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token or a valid preauth token. Once the token is obtained, an attacker could redirect a us...

Debian: Security Advisory (DSA-2129-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

SUSE CVE-2015-2694

The kdcpreauth modules in MIT Kerberos 5 aka krb5 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing 1 zero bytes of data or 2 an arbitrary realm name,...

SUSE CVE-2020-12398

If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird 68.9.0...

SUSE CVE-2020-16118

In GNOME Balsa before 2.6.0, a malicious server operator or man in the middle can trigger a NULL pointer dereference and client crash by sending a PREAUTH response to imapmboxconnect in libbalsa/imap/imap-handle.c...

Active Directory Certificate Services (ADCS) privilege escalation (Certifried)

This module exploits a privilege escalation vulnerability in Active Directory Certificate Services ADCS to generate a valid certificate impersonating the Domain Controller DC computer account. This certificate is then used to authenticate to the target as the DC account using PKINIT...

PT-2025-54079

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a flaw within the ksmbd module related to out-of-bounds access in the decode preauth ctxt function. The issue stems from insufficient boundary checks during the...

Session Fixation

rdiffweb is vulnerable to session fixation. The vulnerability exists because even after logout, the application continues to use the preauthentication cookies, which allows an attacker to gain unauthorized access to the account of a victim who is using the same browser, as long as a single sessio...

CVE-2022-37043

An issue was discovered in the webmail component in Zimbra Collaboration Suite ZCS 8.8.15 and 9.0. When using preauth, CSRF tokens are not checked on some POST endpoints. Thus, when an authenticated user views an attacker-controlled page, a request will be sent to the application that appears to ...

Kerbrute - An Script To Perform Kerberos Bruteforcing By Using Impacket

An script to perform kerberos bruteforcing by using the Impacket library. When is executed, as input it receives a user or list of users and a password or list of password. Then is performs a brute-force attack to enumerate: Valid username/passwords pairs Valid usernames Usernames without...

DEBIAN-CVE-2021-39272

Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a certain situation with IMAP and PREAUTH...

UBUNTU-CVE-2021-39272

Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a certain situation with IMAP and PREAUTH...

DEBIAN-CVE-2021-36222

ecverify in kdc/kdcpreauthec.c in the Key Distribution Center KDC in MIT Kerberos 5 aka krb5 before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation...

UBUNTU-CVE-2021-36222

ecverify in kdc/kdcpreauthec.c in the Key Distribution Center KDC in MIT Kerberos 5 aka krb5 before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation...