OpenSSL v1.0.0.q Release Notes

Release Date: 2015-03-19 // about 7 years ago
    • 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