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Files from OpenSSL Project

First Active2016-03-14
Last Active2016-05-05
FreeBSD Security Advisory - FreeBSD-SA-16:17.openssl
Posted May 5, 2016
Authored by OpenSSL Project | Site security.freebsd.org

FreeBSD Security Advisory - The padding check in AES-NI CBC MAC was rewritten to be in constant time by making sure that always the same bytes are read and compared against either the MAC or padding bytes. But it no longer checked that there was enough data to have both the MAC and padding bytes. [CVE-2016-2107] An overflow can occur in the EVP_EncodeUpdate() function which is used for Base64 encoding of binary data. [CVE-2016-2105] An overflow can occur in the EVP_EncryptUpdate() function, however it is believed that there can be no overflows in internal code due to this problem. [CVE-2016-2106] When ASN.1 data is read from a BIO using functions such as d2i_CMS_bio() a short invalid encoding can casuse allocation of large amounts of memory potentially consuming excessive resources or exhausting memory. [CVE-2016-2109] ASN1 Strings that are over 1024 bytes can cause an overread in applications using the X509_NAME_oneline() function on EBCDIC systems. [CVE-2016-2176] FreeBSD does not run on any EBCDIC systems and therefore is not affected. A MITM attacker can use a padding oracle attack to decrypt traffic when the connection uses an AES CBC cipher and the server support AES-NI. [CVE-2016-2107] If an attacker is able to supply very large amounts of input data then a length check can overflow resulting in a heap corruption. [CVE-2016-2105] Any application parsing untrusted data through d2i BIO functions are vulnerable to memory exhaustion attack. [CVE-2016-2109] TLS applications are not affected.

tags | advisory, overflow
systems | freebsd
advisories | CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, CVE-2016-2109
SHA-256 | 182b52531dd70de627d6fe99dbbd9fa0404b54c26fd1b7e6a5ebb96e63de362d
FreeBSD Security Advisory - FreeBSD-SA-16:12.openssl
Posted Mar 14, 2016
Authored by OpenSSL Project | Site security.freebsd.org

FreeBSD Security Advisory - A cross-protocol attack was discovered that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. Note that traffic between clients and non-vulnerable servers can be decrypted provided another server supporting SSLv2 and EXPORT ciphers (even with a different protocol such as SMTP, IMAP or POP3) shares the RSA keys of the non-vulnerable server. This vulnerability is known as DROWN. Various other issues were also addressed.

tags | advisory, imap, protocol
systems | freebsd, bsd
advisories | CVE-2016-0702, CVE-2016-0703, CVE-2016-0704, CVE-2016-0705
SHA-256 | 3dc25b95a3b0e894796bebc78d2c22db92393a6b8fa48106e84605e40b76a348
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