Denial Of Service (DoS) Through Null Pointer Dereference

OpenSSL is vulnerable to denial of service DoS attacks. This is caused by the sslsetclientdisabled function and triggered by a ServerHello message that includes an SRP ciphersuite but no negotiation of that suite with the client...

CVE-2015-4000

The TLS protocol 1.2 and earlier, when a DHEEXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHEEXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHEEXPORT and then...

openssl: race condition in ssl_parse_serverhello_tlsext

A race condition was found in the way OpenSSL handled ServerHello messages with an included Supported EC Point Format extension. A malicious server could possibly use this flaw to cause a multi-threaded TLS/SSL client using OpenSSL to write into freed memory, causing the client to crash or execut...

Amazon Linux AMI : openssl (ALAS-2014-391)

A flaw was discovered in the way OpenSSL handled DTLS packets. A remote attacker could use this flaw to cause a DTLS server or client using OpenSSL to crash or use excessive amounts of memory. Multiple buffer overflows in crypto/srp/srplib.c in the SRP implementation in OpenSSL 1.0.1 before 1.0.1...

Scientific Linux Security Update : openssl on SL6.x i386/x86_64 (20140813)

A race condition was found in the way OpenSSL handled ServerHello messages with an included Supported EC Point Format extension. A malicious server could possibly use this flaw to cause a multi-threaded TLS/SSL client using OpenSSL to write into freed memory, causing the client to crash or execut...

CVE-2014-5139

The sslsetclientdisabled function in t1lib.c in OpenSSL 1.0.1 before 1.0.1i allows remote SSL servers to cause a denial of service NULL pointer dereference and client application crash via a ServerHello message that includes an SRP ciphersuite without the required negotiation of that ciphersuite...

Null pointer dereference

The sslsetclientdisabled function in t1lib.c in OpenSSL 1.0.1 before 1.0.1i allows remote SSL servers to cause a denial of service NULL pointer dereference and client application crash via a ServerHello message that includes an SRP ciphersuite without the required negotiation of that ciphersuite...

CVE-2014-5139

The sslsetclientdisabled function in t1lib.c in OpenSSL 1.0.1 before 1.0.1i allows remote SSL servers to cause a denial of service NULL pointer dereference and client application crash via a ServerHello message that includes an SRP ciphersuite without the required negotiation of that ciphersuite...

openssl: race condition in ssl_parse_serverhello_tlsext

A race condition was found in the way OpenSSL handled ServerHello messages with an included Supported EC Point Format extension. A malicious server could possibly use this flaw to cause a multi-threaded TLS/SSL client using OpenSSL to write into freed memory, causing the client to crash or execut...

openssl: DoS when sending invalid DTLS handshake

A denial of service flaw was found in the way OpenSSL handled certain DTLS ServerHello requests. A specially crafted DTLS handshake packet could cause a DTLS client using OpenSSL to crash...

CVE-2014-5139: Undefined Security Weakness

The sslsetclientdisabled function in t1lib.c in OpenSSL 1.0.1 before 1.0.1i allows remote SSL servers to cause a denial of service NULL pointer dereference and client application crash via a ServerHello message that includes an SRP ciphersuite without the required negotiation of that ciphersuite...

Ubuntu 14.04 LTS : OpenSSL vulnerabilities (USN-2308-1)

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2308-1 advisory. Adam Langley and Wan-Teh Chang discovered that OpenSSL incorrectly handled certain DTLS packets. A remote attacker could use this issue to cause OpenSSL ...

USN-2308-1: OpenSSL vulnerabilities

Adam Langley and Wan-Teh Chang discovered that OpenSSL incorrectly handled certain DTLS packets. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. CVE-2014-3505 Adam Langley discovered that OpenSSL incorrectly handled memory when processing DTLS...

UBUNTU-CVE-2014-5139

The sslsetclientdisabled function in t1lib.c in OpenSSL 1.0.1 before 1.0.1i allows remote SSL servers to cause a denial of service NULL pointer dereference and client application crash via a ServerHello message that includes an SRP ciphersuite without the required negotiation of that ciphersuite...

Medium: openssl

Issue Overview: A flaw was discovered in the way OpenSSL handled DTLS packets. A remote attacker could use this flaw to cause a DTLS server or client using OpenSSL to crash or use excessive amounts of memory. Multiple buffer overflows in crypto/srp/srplib.c in the SRP implementation in OpenSSL...

CVE-2014-5139

The sslsetclientdisabled function in t1lib.c in OpenSSL 1.0.1 before 1.0.1i allows remote SSL servers to cause a denial of service NULL pointer dereference and client application crash via a ServerHello message that includes an SRP ciphersuite without the required negotiation of that ciphersuite...

PT-2014-1701

Name of the Vulnerable Software and Affected Versions OpenSSL versions 1.0.1 through 1.0.1i OpenSSL versions prior to 1.0.1j Description The issue allows remote SSL servers to cause a denial of service, resulting in a NULL pointer dereference and client application crash. This can be achieved...

PT-2014-1700

Name of the Vulnerable Software and Affected Versions OpenSSL versions 1.0.0 through 1.0.0n OpenSSL versions 1.0.1 through 1.0.1i Description A race condition in the ssl parse serverhello tlsext function in OpenSSL, when multithreading and session resumption are used, allows remote SSL servers to...

gnutls: insufficient session id length check in _gnutls_read_server_hello (GNUTLS-SA-2014-3)

A flaw was found in the way GnuTLS parsed session IDs from ServerHello messages of the TLS/SSL handshake. A malicious server could use this flaw to send an excessively long session ID value, which would trigger a buffer overflow in a connecting TLS/SSL client application using GnuTLS, causing the...

openssl: DoS when sending invalid DTLS handshake

A denial of service flaw was found in the way OpenSSL handled certain DTLS ServerHello requests. A specially crafted DTLS handshake packet could cause a DTLS client using OpenSSL to crash...