Samba AD DC S4U2Self/S4U2Proxy unkeyed checksum

Description S4U2Self is an extension to Kerberos used in Active Directory to allow a service to request a kerberos ticket to itself from the Kerberos Key Distribution Center KDC for a non-Kerberos authenticated user principal in Kerboros parlance. This is useful to allow internal code paths to be...

samba -- multiple vulnerabilities

The samba project reports: The checksum validation in the S4U2Self handler in the embedded Heimdal KDC did not first confirm that the checksum was keyed, allowing replacement of the requested target client principal Authenticated users with write permission can trigger a symlink traversal to writ...

Denial Of Service (DoS)

Kerberos is a networked authentication system which allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos KDC. A memory leak flaw was found in the krb5unparsename function of the MIT Kerberos kadmind service. An authenticated attacker could...

Remote Code Execution

Kerberos is vulnerable to remote code execution RCE. If kadmind were used with an LDAP back end for the KDC database, a remote, authenticated attacker who has the permissions to set the password policy could crash kadmind by attempting to use a named ticket policy object as a password policy for ...

Denial Of Service (DoS)

Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center KDC. When a client attempts to use PKINIT to obtain credentials from the KDC, the client can specify, using ...

Denial Of Service (DoS)

Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center KDC. An uninitialized pointer use flaw was found in the way the MIT Kerberos KDC handled initial...

Debian DLA-1643-1 : krb5 security update

krb5, a MIT Kerberos implementation, had several flaws in LDAP DN checking, which could be used to circumvent a DN containership check by supplying special parameters to some calls. Further an attacker could crash the KDC by making S4U2Self requests. For Debian 8 'Jessie', these problems have bee...

Debian: Security Advisory (DLA-1643-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2019 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...

Denial Of Service

Kerberos is vulnerable to denial of service DoS. The attack is possible when malicious requests can be sent to the setupserverrealm function to cause a NULL pointer dereference, crashing the KDC...

Denial Of Service (DoS)

krb5 is vulnerable to denial of service DoS attacks. The vulnerability exists as the pkinitserverreturnpadata function in plugins/preauth/pkinit/pkinitsrv.c in the PKINIT implementation in the Key Distribution Center KDC in MIT Kerberos 5 aka krb5 before 1.10.4 attempts to find an agility KDF...

CVE-2018-20217

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 aka krb5 before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type single-DES, triple-DES, or RC4, the attacker can crash the KDC by making an S4U2Self request...

MGASA-2019-0028 Updated krb5 packages fix security vulnerability

An authenticated user who can obtain a TGT using an older encryption type DES, DES3, or RC4 can cause an assertion failure in the KDC by sending an S4U2Self request CVE-2018-20217...

Updated krb5 packages fix security vulnerability

An authenticated user who can obtain a TGT using an older encryption type DES, DES3, or RC4 can cause an assertion failure in the KDC by sending an S4U2Self request CVE-2018-20217...

EulerOS Virtualization 2.5.2 : krb5 (EulerOS-SA-2018-1408)

According to the versions of the krb5 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client...

CVE-2018-20217

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 aka krb5 before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type single-DES, triple-DES, or RC4, the attacker can crash the KDC by making an S4U2Self request...

CVE-2018-20217

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 aka krb5 before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type single-DES, triple-DES, or RC4, the attacker can crash the KDC by making an S4U2Self request...

Design/Logic Flaw

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 aka krb5 before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type single-DES, triple-DES, or RC4, the attacker can crash the KDC by making an S4U2Self request...

CVE-2018-20217

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 aka krb5 before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type single-DES, triple-DES, or RC4, the attacker can crash the KDC by making an S4U2Self request...

CVE-2018-20217

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 aka krb5 before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type single-DES, triple-DES, or RC4, the attacker can crash the KDC by making an S4U2Self request...

CVE-2018-20217

CVE-2018-20217 affects MIT Kerberos 5 (krb5) KDC prior to patch level; a reachable assertion can be triggered in the KDC if an attacker obtains a krbtgt ticket with an old encryption type (DES/RC4) and issues an S4U2Self request, potentially crashing the KDC. Public advisories note the vulnerabil...