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Ralf S. Engelschall
committed
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Changes between 1.0.1n and 1.0.1o [xx XXX xxxx]
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*) Malformed ECParameters causes infinite loop
When processing an ECParameters structure OpenSSL enters an infinite loop
if the curve specified is over a specially malformed binary polynomial
field.
This can be used to perform denial of service against any
system which processes public keys, certificate requests or
certificates. This includes TLS clients and TLS servers with
client authentication enabled.
This issue was reported to OpenSSL by Joseph Barr-Pixton.
(CVE-2015-1788)
[Andy Polyakov]
*) Exploitable out-of-bounds read in X509_cmp_time
X509_cmp_time does not properly check the length of the ASN1_TIME
string and can read a few bytes out of bounds. In addition,
X509_cmp_time accepts an arbitrary number of fractional seconds in the
time string.
An attacker can use this to craft malformed certificates and CRLs of
various sizes and potentially cause a segmentation fault, resulting in
a DoS on applications that verify certificates or CRLs. TLS clients
that verify CRLs are affected. TLS clients and servers with client
authentication enabled may be affected if they use custom verification
callbacks.
This issue was reported to OpenSSL by Robert Swiecki (Google), and
independently by Hanno Böck.
(CVE-2015-1789)
[Emilia Käsper]
*) PKCS7 crash with missing EnvelopedContent
The PKCS#7 parsing code does not handle missing inner EncryptedContent
correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs
with missing content and trigger a NULL pointer dereference on parsing.
Applications that decrypt PKCS#7 data or otherwise parse PKCS#7
structures from untrusted sources are affected. OpenSSL clients and
servers are not affected.
This issue was reported to OpenSSL by Michal Zalewski (Google).
(CVE-2015-1790)
[Emilia Käsper]
*) CMS verify infinite loop with unknown hash function
When verifying a signedData message the CMS code can enter an infinite loop
if presented with an unknown hash function OID. This can be used to perform
denial of service against any system which verifies signedData messages using
the CMS code.
This issue was reported to OpenSSL by Johannes Bauer.
(CVE-2015-1792)
[Stephen Henson]
*) Race condition handling NewSessionTicket
If a NewSessionTicket is received by a multi-threaded client when attempting to
reuse a previous ticket then a race condition can occur potentially leading to
a double free of the ticket data.
(CVE-2015-1791)
[Matt Caswell]
*) Reject DH handshakes with parameters shorter than 768 bits.
[Kurt Roeckx and Emilia Kasper]
Changes between 1.0.1l and 1.0.1m [19 Mar 2015]
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*) Segmentation fault in ASN1_TYPE_cmp fix
The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
certificate signature algorithm consistency this can be used to crash any
certificate verification operation and exploited in a DoS attack. Any
application which performs certificate verification is vulnerable including
OpenSSL clients and servers which enable client authentication.
(CVE-2015-0286)
[Stephen Henson]
*) ASN.1 structure reuse memory corruption fix
Reusing a structure in ASN.1 parsing may allow an attacker to cause
memory corruption via an invalid write. Such reuse is and has been
strongly discouraged and is believed to be rare.
Applications that parse structures containing CHOICE or ANY DEFINED BY
components may be affected. Certificate parsing (d2i_X509 and related
functions) are however not affected. OpenSSL clients and servers are
not affected.
(CVE-2015-0287)
[Stephen Henson]
*) PKCS7 NULL pointer dereferences fix
The PKCS#7 parsing code does not handle missing outer ContentInfo
correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
missing content and trigger a NULL pointer dereference on parsing.
Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
otherwise parse PKCS#7 structures from untrusted sources are
affected. OpenSSL clients and servers are not affected.
This issue was reported to OpenSSL by Michal Zalewski (Google).
(CVE-2015-0289)
[Emilia Käsper]
*) DoS via reachable assert in SSLv2 servers fix
A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
servers that both support SSLv2 and enable export cipher suites by sending
a specially crafted SSLv2 CLIENT-MASTER-KEY message.
This issue was discovered by Sean Burford (Google) and Emilia Käsper
(OpenSSL development team).
(CVE-2015-0293)
[Emilia Käsper]
*) Use After Free following d2i_ECPrivatekey error fix
A malformed EC private key file consumed via the d2i_ECPrivateKey function
could cause a use after free condition. This, in turn, could cause a double
free in several private key parsing functions (such as d2i_PrivateKey
or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
for applications that receive EC private keys from untrusted
sources. This scenario is considered rare.
This issue was discovered by the BoringSSL project and fixed in their
commit 517073cd4b.
(CVE-2015-0209)
[Matt Caswell]
*) X509_to_X509_REQ NULL pointer deref fix
The function X509_to_X509_REQ will crash with a NULL pointer dereference if
the certificate key is invalid. This function is rarely used in practice.
This issue was discovered by Brian Carpenter.
(CVE-2015-0288)
[Stephen Henson]
*) Removed the export ciphers from the DEFAULT ciphers
[Kurt Roeckx]
Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
*) Build fixes for the Windows and OpenVMS platforms
[Matt Caswell and Richard Levitte]
Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
*) Fix 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. Thanks to
Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
(CVE-2014-3571)
[Steve Henson]
*) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
dtls1_buffer_record 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 through memory exhaustion.
Thanks to Chris Mueller for reporting this issue.
(CVE-2015-0206)
[Matt Caswell]
*) Fix issue where 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. Thanks to Frank Schmirler for reporting this issue.
(CVE-2014-3569)
[Kurt Roeckx]
*) Abort handshake if server key exchange message is omitted for ephemeral
ECDH ciphersuites.
Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
reporting this issue.
*) Remove non-export ephemeral RSA code on client and server. This code
violated the TLS standard by allowing the use of temporary RSA keys in
non-export ciphersuites and could be used by a server to effectively
downgrade the RSA key length used to a value smaller than the server
certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
INRIA or reporting this issue.
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