Scientific Linux Security Update : openssl on SL6.x, SL7.x i386/x86_64 (20170220)

Security Fixes : - An integer underflow leading to an out of bounds read flaw was found in OpenSSL. A remote attacker could possibly use this flaw to crash a 32-bit TLS/SSL server or client using OpenSSL if it used the RC4-MD5 cipher suite. CVE-2017-3731 - A denial of service flaw was found in th...

SSL/TLS: Malformed plain-text ALERT packets could cause remote DoS

A denial of service flaw was found in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients...

FreeBSD : openssl -- crash on handshake (1a802ba9-f444-11e6-9940-b499baebfeaf)

The OpenSSL project reports : Severity: High During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake or vice-versa then this can cause OpenSSL to crash dependent on ciphersuite. Both clients and servers are affected. This issue...

Encrypt-Then-Mac renegotiation crash

During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake or vice-versa then this can cause OpenSSL to crash dependent on ciphersuite. Both clients and servers are affected...

openssl -- crash on handshake

The OpenSSL project reports: Severity: High During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake or vice-versa then this can cause OpenSSL to crash dependent on ciphersuite. Both clients and servers are affected. This issue do...

Cryptographic Protection Bypass

OpenSSL is vulnerable to cryptographic protection bypass. This is possible because it doesn't ensure that the PRNG is seeded before proceeding with a handshake. The flaw allows attackers to defeat the cryptographic protection mechanisms by sniffing the network then performing a brute-force attack...

Access Bypass

OpenSSL is vulnerable to access bypass. OpenSSL accepts client authentication with a Diffie-Helman certificate without receiving a CertificateValue message. This allows attacks to gain access without the knowledge of a private key via crafted TLS Handshake Protocol traffic to a server that...

Cipher Bypass

OpenSSL is vulnerable to cipher bypasses. A malicious user can negotiate and complete an SSLv2 handshake with the server even if the ciphers have been disabled on the server. SSLv2 handshakes are vulnerable to man-in-the-middle attacks...

Denial Of Service (DoS) Through Recursion

OpenSSL is vulnerable to denial of service DoS attacks. These attacks can be made using an invalid DTLS handshake causing OpenSSL to go into a recursive loop...

Denial Of Service (DoS) Through Memory Consumption

OpenSSL is vulnerable to denial of service DoS through memory consumption. This can be triggered through a DTLS handshake method which forces OpenSSL to process a large amount of data, exhausting the memory...

Denial Of Service (DoS) Through Null Pointer Dereference

OpenSSL is vulnerable to denial of service DoS attacks through a null pointer dereference. This can be triggered at remote DTLS servers by a handshake message where the ciphersuite is specified as a 1 anonymous DH or 2 anonymous ECDH ciphersuite...

CVE-2016-10207

A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early...

Debian DLA-814-1 : openssl security update

Several vulnerabilities were discovered in OpenSSL : CVE-2016-7056 A local timing attack was discovered against ECDSA P-256. CVE-2016-8610 It was discovered that no limit was imposed on alert packets during an SSL handshake. CVE-2017-3731 Robert Swiecki discovered that the RC4-MD5 cipher when...

[SECURITY] [DLA 814-1] openssl security update

Package : openssl Version : 1.0.1t-1+deb7u2 CVE ID : CVE-2016-7056 CVE-2016-8610 CVE-2017-3731 Several vulnerabilities were discovered in OpenSSL: CVE-2016-7056 A local timing attack was discovered against ECDSA P-256. CVE-2016-8610 It was discovered that no limit was imposed on alert packets...

Debian DSA-3773-1 : openssl - security update

Several vulnerabilities were discovered in OpenSSL : - CVE-2016-7056 A local timing attack was discovered against ECDSA P-256. - CVE-2016-8610 It was discovered that no limit was imposed on alert packets during an SSL handshake. - CVE-2017-3731 Robert Swiecki discovered that the RC4-MD5 cipher wh...

[SECURITY] [DSA 3773-1] openssl security update

------------------------------------------------------------------------- Debian Security Advisory DSA-3773-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff January 27, 2017 https://www.debian.org/security/faq -...

Weak Diffie-Hellman Handshake Due To Truncated Secret Length

libssh2 is vulnerable to weak handshakes. The vulnerability happens because diffiehellmansha256 function in kex.c in libssh2 generates secret key of length 128 or 256 bits instead of 1023 or 2047 bits, allowing the attackers to intercept or decrypt SSH sessions using bits/bytes confusion bug...

Debian Security Advisory DSA 3773-1 (openssl - security update)

Several vulnerabilities were discovered in OpenSSL: CVE-2016-7056 A local timing attack was discovered against ECDSA P-256. CVE-2016-8610 It was discovered that no limit was imposed on alert packets during an SSL handshake. CVE-2017-3731 Robert Swiecki discovered that the RC4-MD5 cipher when...

Denial Of Service (DoS)

OpenSSL is vulnerable to denial of service attacks. The attacks are due to a flaw in the way OpenSSL does the SSLv2 handshake messages. Therefore, when it has SSLv2 and EXPORT-grade cipher suites enabled, attackers can send malicious SSLv2 CLIENT-MASTER-Key messages to cause server failures...

Weapon of Mass Destruction: WMD

Weapon of Mass Destruction This is a python tool with a collection of IT security software. The software is incapsulated in “modules”. The modules does consist of pure python code and/or external third programs. Main functions 1 To use a module, run the command “use modulecall”, e.g. “use apsniff...