Vulnerability in OpenSSL - Segmentation fault in DTLSv1_listen

Segmentation fault in DTLSv1listen. A defect in the implementation of DTLSv1listen means that state is preserved in the SSL object from one invocation to the next that can lead to a segmentation fault. Errors processing the initial ClientHello can trigger this scenario. An example of such an erro...

Vulnerability in OpenSSL - Handshake with unseeded PRNG

Under certain conditions an OpenSSL 1.0.2 client can complete a handshake with an unseeded PRNG. If the handshake succeeds then the client random that has been used will have been generated from a PRNG with insufficient entropy and therefore the output may be predictable...

Vulnerability in OpenSSL - X509_to_X509_REQ NULL pointer deref

X509toX509REQ NULL pointer deref. The function X509toX509REQ will crash with a NULL pointer dereference if the certificate key is invalid. This function is rarely used in practice...

Vulnerability in OpenSSL - DTLS memory leak in dtls1_buffer_record

A memory leak can occur in the dtls1bufferrecord function under certain conditions. In particular this could occur if an attacker sent repeated DTLS records with the same sequence number but for the next epoch. The memory leak could be exploited by an attacker in a Denial of Service attack throug...

Vulnerability in OpenSSL - Bignum squaring may produce incorrect results

Bignum squaring BNsqr may produce incorrect results on some platforms, including x8664. This bug occurs at random with a very low probability, and is not known to be exploitable in any way, though its exact impact is difficult to determine. The following has been determined: The probability of...

Vulnerability in OpenSSL - DH client certificates accepted without verification [Server]

An OpenSSL server will accept a DH certificate for client authentication without the certificate verify message. This effectively allows a client to authenticate without the use of a private key. This only affects servers which trust a client certificate authority which issues certificates...

Vulnerability in OpenSSL - RSA silently downgrades to EXPORT_RSA [Client]

An OpenSSL client will accept the use of an RSA temporary key in a non-export RSA key exchange ciphersuite. A server could present a weak temporary key and downgrade the security of the session...

Vulnerability in OpenSSL - Certificate fingerprints can be modified

OpenSSL accepts several non-DER-variations of certificate signature algorithm and signature encodings. OpenSSL also does not enforce a match between the signature algorithm between the signed and unsigned portions of the certificate. By modifying the contents of the signature algorithm or the...

Vulnerability in OpenSSL - ECDHE silently downgrades to ECDH [Client]

An OpenSSL client will accept a handshake using an ephemeral ECDH ciphersuite using an ECDSA certificate if the server key exchange message is omitted. This effectively removes forward secrecy from the ciphersuite...

Vulnerability in OpenSSL - DTLS segmentation fault in dtls1_get_record

A carefully crafted DTLS message can cause a segmentation fault in OpenSSL due to a NULL pointer dereference. This could lead to a Denial Of Service attack...

Vulnerability in OpenSSL - no-ssl3 configuration sets method to NULL

When openssl is built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl method would be set to NULL which could later result in a NULL pointer dereference...

Vulnerability in OpenSSL - SRTP Memory Leak

A flaw in the DTLS SRTP extension parsing code allows an attacker, who sends a carefully crafted handshake message, to cause OpenSSL to fail to free up to 64k of memory causing a memory leak. This could be exploited in a Denial Of Service attack. This issue affects OpenSSL 1.0.1 server...

Vulnerability in OpenSSL - Session Ticket Memory Leak

When an OpenSSL SSL/TLS/DTLS server receives a session ticket the integrity of that ticket is first verified. In the event of a session ticket integrity check failing, OpenSSL will fail to free memory causing a memory leak. By sending a large number of invalid session tickets an attacker could...

Vulnerability in OpenSSL - Build option no-ssl3 is incomplete

When OpenSSL is configured with “no-ssl3” as a build option, servers could accept and complete a SSL 3.0 handshake, and clients could be configured to send them...

Vulnerability in OpenSSL - DTLS memory exhaustion

A DTLS flaw leading to memory exhaustion was found. An attacker can force openssl to consume large amounts of memory whilst processing DTLS handshake messages. This could lead to a Denial of Service attack...

Vulnerability in OpenSSL - DTLS memory leak from zero-length fragments

A DTLS memory leak from zero-length fragments was found. By sending carefully crafted DTLS packets an attacker could cause OpenSSL to leak memory. This could lead to a Denial of Service attack...

Vulnerability in OpenSSL - Information leak in pretty printing functions

A flaw in OBJobj2txt may cause pretty printing functions such as X509nameoneline, X509nameprintex, to leak some information from the stack. Applications may be affected if they echo pretty printing output to the attacker. OpenSSL SSL/TLS clients and servers themselves are not affected...

Vulnerability in OpenSSL - Double Free when processing DTLS packets

A Double Free was found when processing DTLS packets. An attacker can force an error condition which causes openssl to crash whilst processing DTLS packets due to memory being freed twice. This could lead to a Denial of Service attack...

Vulnerability in OpenSSL - Crash with SRP ciphersuite in Server Hello message

A crash was found affecting SRP ciphersuites used in a Server Hello message. The issue affects OpenSSL clients and allows a malicious server to crash the client with a null pointer dereference read by specifying an SRP ciphersuite even though it was not properly negotiated with the client. This...

Vulnerability in OpenSSL - OpenSSL DTLS anonymous EC(DH) denial of service

A flaw in handling DTLS anonymous ECDH ciphersuites was found. OpenSSL DTLS clients enabling anonymous ECDH ciphersuites are subject to a denial of service attack. A malicious server can crash the client with a null pointer dereference read by specifying an anonymous ECDH ciphersuite and sending...

Vulnerability in OpenSSL - OpenSSL TLS protocol downgrade attack

A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate TLS 1.0 instead of higher protocol versions when the ClientHello message is badly fragmented. This allows a man-in-the-middle attacker to force a downgrade to TLS 1.0 even if both the server and the client support a higher...

Vulnerability in OpenSSL - SRP buffer overrun

A SRP buffer overrun was found. A malicious client or server can send invalid SRP parameters and overrun an internal buffer. Only applications which are explicitly set up for SRP use are affected...

Vulnerability in OpenSSL - Race condition in ssl_parse_serverhello_tlsext

A race condition was found in sslparseserverhellotlsext. If a multithreaded client connects to a malicious server using a resumed session and the server sends an ec point format extension, it could write up to 255 bytes to freed memory...

Vulnerability in OpenSSL - SSL/TLS MITM vulnerability

An attacker can force the use of weak keying material in OpenSSL SSL/TLS clients and servers. This can be exploited by a Man-in-the-middle MITM attack where the attacker can decrypt and modify traffic from the attacked client and server...

Vulnerability in OpenSSL - DTLS recursion flaw

By sending an invalid DTLS handshake to an OpenSSL DTLS client the code can be made to recurse eventually crashing in a DoS attack. Only applications using OpenSSL as a DTLS client are affected...

Vulnerability in OpenSSL - DTLS invalid fragment vulnerability

A buffer overrun attack can be triggered by sending invalid DTLS fragments to an OpenSSL DTLS client or server. This is potentially exploitable to run arbitrary code on a vulnerable client or server. Only applications using OpenSSL as a DTLS client or server affected...

Vulnerability in OpenSSL - Anonymous ECDH denial of service

OpenSSL TLS clients enabling anonymous ECDH ciphersuites are subject to a denial of service attack...

Vulnerability in OpenSSL - SSL_MODE_RELEASE_BUFFERS NULL pointer dereference

A flaw in the dossl3write function can allow remote attackers to cause a denial of service via a NULL pointer dereference. This flaw only affects OpenSSL 1.0.0 and 1.0.1 where SSLMODERELEASEBUFFERS is enabled, which is not the default and not common...

Vulnerability in OpenSSL - SSL_MODE_RELEASE_BUFFERS session injection or denial of service

A race condition in the ssl3readbytes function can allow remote attackers to inject data across sessions or cause a denial of service. This flaw only affects multithreaded applications using OpenSSL 1.0.0 and 1.0.1, where SSLMODERELEASEBUFFERS is enabled, which is not the default and not common...

Vulnerability in OpenSSL - TLS heartbeat read overrun

A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64kB of memory to a connected client or server a.k.a. Heartbleed. This issue did not affect versions of OpenSSL prior to 1.0.1...

Vulnerability in OpenSSL CVE-2014-0076

Fix for the attack described in the paper “Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack”...

Vulnerability in OpenSSL CVE-2013-4353

A carefully crafted invalid TLS handshake could crash OpenSSL with a NULL pointer exception. A malicious server could use this flaw to crash a connecting client. This issue only affected OpenSSL 1.0.1 versions...

Vulnerability in OpenSSL CVE-2013-6449

A flaw in OpenSSL can cause an application using OpenSSL to crash when using TLS version 1.2. This issue only affected OpenSSL 1.0.1 versions...

Vulnerability in OpenSSL CVE-2013-6450

A flaw in DTLS handling can cause an application using OpenSSL and DTLS to crash. This is not a vulnerability for OpenSSL prior to 1.0.0...

Vulnerability in OpenSSL - TLS 1.1 and 1.2 AES-NI crash

A flaw in the OpenSSL handling of CBC ciphersuites in TLS 1.1 and TLS 1.2 on AES-NI supporting platforms can be exploited in a DoS attack...

Vulnerability in OpenSSL - OCSP invalid key DoS issue

A flaw in the OpenSSL handling of OCSP response verification can be exploited in a denial of service attack...

Vulnerability in OpenSSL - SSL, TLS and DTLS Plaintext Recovery Attack

A weakness in the handling of CBC ciphersuites in SSL, TLS and DTLS which could lead to plaintext recovery by exploiting timing differences arising during MAC processing...

Vulnerability in OpenSSL - Invalid TLS/DTLS record attack

An integer underflow flaw, leading to a buffer over-read, was found in the way OpenSSL handled TLS 1.1, TLS 1.2, and DTLS Datagram Transport Layer Security application data record lengths when using a block cipher in CBC cipher-block chaining mode. A malicious TLS 1.1, TLS 1.2, or DTLS client or...

Vulnerability in OpenSSL - ASN1 BIO incomplete fix

It was discovered that the fix for CVE-2012-2110 released on 19 Apr 2012 was not sufficient to correct the issue for OpenSSL 0.9.8. This issue only affects OpenSSL 0.9.8v. OpenSSL 1.0.1a and 1.0.0i already contain a patch sufficient to correct CVE-2012-2110...

Vulnerability in OpenSSL - ASN1 BIO vulnerability

Multiple numeric conversion errors, leading to a buffer overflow, were found in the way OpenSSL parsed ASN.1 Abstract Syntax Notation One data from BIO OpenSSL’s I/O abstraction inputs. Specially-crafted DER Distinguished Encoding Rules encoded data read from a file or other BIO input could cause...

Vulnerability in OpenSSL - CMS and S/MIME Bleichenbacher attack

A weakness in the OpenSSL CMS and PKCS 7 code can be exploited using Bleichenbacher’s attack on PKCS 1 v1.5 RSA padding also known as the million message attack MMA. Only users of CMS, PKCS 7, or S/MIME decryption operations are affected, SSL/TLS applications are not affected by this issue...

Vulnerability in OpenSSL - Double-free in Policy Checks

If X509VFLAGPOLICYCHECK is set in OpenSSL 0.9.8, then a policy check failure can lead to a double-free. The bug does not occur unless this flag is set. Users of OpenSSL 1.0.0 are not affected...

Vulnerability in OpenSSL - SGC Restart DoS Attack

Support for handshake restarts for server gated cryptograpy SGC can be used in a denial-of-service attack...

Vulnerability in OpenSSL - Invalid GOST parameters DoS Attack

A malicious TLS client can send an invalid set of GOST parameters which will cause the server to crash due to lack of error checking. This could be used in a denial-of-service attack. Only users of the OpenSSL GOST ENGINE are affected by this bug...

Vulnerability in OpenSSL - Uninitialized SSL 3.0 Padding

OpenSSL failed to clear the bytes used as block cipher padding in SSL 3.0 records which could leak the contents of memory in some circumstances...

Vulnerability in OpenSSL - DTLS Plaintext Recovery Attack

OpenSSL was susceptable an extension of the Vaudenay padding oracle attack on CBC mode encryption which enables an efficient plaintext recovery attack against the OpenSSL implementation of DTLS by exploiting timing differences arising during decryption processing...

Vulnerability in OpenSSL - DTLS DoS attack

A flaw in the fix to CVE-2011-4108 can be exploited in a denial of service attack. Only DTLS applications are affected...

Vulnerability in OpenSSL - Malformed RFC 3779 Data Can Cause Assertion Failures

RFC 3779 data can be included in certificates, and if it is malformed, may trigger an assertion failure. This could be used in a denial-of-service attack. Builds of OpenSSL are only vulnerable if configured with “enable-rfc3779”, which is not a default...

Vulnerability in OpenSSL CVE-2011-3207

Under certain circumstances OpenSSL’s internal certificate verification routines can incorrectly accept a CRL whose nextUpdate field is in the past. Applications are only affected by the CRL checking vulnerability if they enable OpenSSL’s internal CRL checking which is off by default. Application...

Vulnerability in OpenSSL CVE-2011-3210

OpenSSL server code for ephemeral ECDH ciphersuites is not thread-safe, and furthermore can crash if a client violates the protocol by sending handshake messages in incorrect order. Only server-side applications that specifically support ephemeral ECDH ciphersuites are affected, and only if...