USN-3087-1: OpenSSL vulnerabilities

Shi Lei discovered that OpenSSL incorrectly handled the OCSP Status Request extension. A remote attacker could possibly use this issue to cause memory consumption, resulting in a denial of service. CVE-2016-6304 Guido Vranken discovered that OpenSSL used undefined behaviour when performing pointe...

Metasploit config.action_dispatch.cookies_serializer deserialization vulnerability

Metasploit is an open source security vulnerability detection tool that helps security and IT professionals identify security issues, validate mitigations for vulnerabilities, and manage expert-driven security for assessments that provide true security risk intelligence. A deserialization...

Skyliner: DNSSEC misconfiguration

First of all I will start with some theory. DNS is a system to translate a domain name to an ip address. Normally a computer automatically trust a DNS server and connects to the IP provided by the DNS server. This is prone to security issues because a malicious wifi network, an attacker on your...

SUSE SLED12 / SLES12 Security Update : samba (SUSE-SU-2016:2306-1)

This update for samba provides the following fixes : - CVE-2016-2119: Prevent client-side SMB2 signing downgrade. bsc986869 - Fix possible ctdb crash when opening sockets with htonsIPPROTORAW. bsc969522 - Honor smb.conf socket options in winbind. bsc975131 - Fix ntlm-auth segmentation fault with...

SUSE-SU-2016:2306-1 Security update for samba

This update for samba provides the following fixes: - CVE-2016-2119: Prevent client-side SMB2 signing downgrade. bsc986869 - Fix possible ctdb crash when opening sockets with htonsIPPROTORAW. bsc969522 - Honor smb.conf socket options in winbind. bsc975131 - Fix ntlm-auth segmentation fault with...

Could not sign CSR Caused by: java.net.SocketTimeoutException: connect timed out

After configuring Client Certificate Authentication for XMS but you do not see a Client Certificate Request on the Issuing Server 2016-06-27T13:01:11.409+0000 | | ERROR | http-nio-10080-exec-1 | EWSession | Exception on certificate issuer com.zenprise.zdm.pki.spi.IssuingServiceException: Could no...

Could not sign CSR Caused by: java.io.IOException: Cannot obtain certificate from certsrv authority: 401 Unauthorized

After configuring Client Certificate Authentication for XMS but you cannot request a certificate from the Issuing Server java.lang.RuntimeException: Could not create mobileconfig PA Credentials at com.sparus.nps.iphone.mobileconfig.MobileConfig.toPListMobileConfig.java:574 at...

Could not sign CSR Caused by: java.io.IOException: Could not obtain certificate (template=XenmobileTest). Reason: The format of the specified domain name is invalid. 0x800704bc (WIN32: 1212)

After configuring Client Certificate Authentication for XMS but you do not see an issued certificate on the Issuing Server 2016-08-18T12:49:32.19+0200 | | ERROR | http-nio-10443-exec-8 | EWSession | Exception on certificate issuer com.zenprise.zdm.pki.spi.IssuingServiceException: Could not sign C...

JWCrypto Information Disclosure Vulnerability

JWCrypto is an implementation of the Javascript Object Signing and Encryption JOSE web standard . An information disclosure vulnerability exists in JWCrypto that could be exploited by an attacker to obtain sensitive information...

F5 Networks BIG-IP : Samba vulnerabilities (K53313971)

CVE-2016-2110 The NTLMSSP authentication implementation in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 allows man-in-the-middle attackers to perform protocol-downgrade attacks by modifying the client-server data stream to remove application-layer flags or encryptio...

Amazon Linux AMI : samba (ALAS-2016-732)

A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. C Tenable Network Security, Inc. The descriptive text and package checks in this plugin wer...

Debian DLA-575-2 : collectd regression update

The previous upload of collectd surfaced a problem in the way the network plugin initializes gcrypt preventing the plugin from being loaded when packet signing or encryption is enabled. Previously, this may have led to program crashes. For Debian 7 'Wheezy', these problems have been fixed in...

samba: Client side SMB2/3 required signing can be downgraded

A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server...

samba: Client side SMB2/3 required signing can be downgraded

A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server...

samba: Client side SMB2/3 required signing can be downgraded

A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server...

Keeping Positive – Obtaining Arbitrary Wildcard SSL Certificates from Comodo via Dangling Markup Injection

I recently decided to investigate the security of various certificate authority’s online certificate issuing systems. These online issuers allow certificate authorities to verify that someone owns a specific domain, such as thehackerblog.com and get a signed certificate so they can enable SSL/TLS...

Samba 4.x < 4.2.14 / 4.3.x < 4.3.11 / 4.4.x < 4.4.5 SMB2/3 Client Connection Required Signing Downgrade

The version of Samba running on the remote host is 4.x prior to 4.2.14, 4.3.x prior to 4.3.11, or 4.4.x prior to 4.4.5. It is, therefore, affected by a flaw in libcli/smb/smbXclibase.c that is triggered when handling SMB2 and SMB3 client connections. A man-in-the-middle attacker can exploit this,...

openSUSE Security Update : samba (openSUSE-2016-881)

"This update for samba fixes the following issues : - Prevent client-side SMB2 signing downgrade; CVE-2016-2119; bso11860 %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The descriptive text and package checks in this plugin were extracted from openSUSE Security Update openSUSE-2016-881. The...

FreeBSD : samba -- client side SMB2/3 required signing can be downgraded (4729c849-4897-11e6-b704-000c292e4fd8)

Samba team reports : A man in the middle attack can disable client signing over SMB2/3, even if enforced by configuration parameters. %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The descriptive text and package checks in this plugin were extracted from the FreeBSD VuXML database :...

CVE-2016-2119

libcli/smb/smbXclibase.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the 1 SMB2SESSIONFLAGISGUEST or 2 SMB2SESSIONFLAGISNULL flag...