diff options
| -rw-r--r-- | CHANGES | 66 | ||||
| -rw-r--r-- | NEWS | 10 |
2 files changed, 75 insertions, 1 deletions
@@ -423,6 +423,72 @@ Changes between 1.0.2a and 1.0.2b [xx XXX xxxx] + *) 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] + *) Only support 256-bit or stronger elliptic curves with the 'ecdh_auto' setting (server) or by default (client). Of supported curves, prefer P-256 (both). @@ -5,7 +5,15 @@ This file gives a brief overview of the major changes between each OpenSSL release. For more details please read the CHANGES file. - Major changes between OpenSSL 1.0.2 and OpenSSL 1.0.2a [under development] + Major changes between OpenSSL 1.0.2a and OpenSSL 1.0.2b [under development] + + o Malformed ECParameters causes infinite loop (CVE-2015-1788) + o Exploitable out-of-bounds read in X509_cmp_time (CVE-2015-1789) + o PKCS7 crash with missing EnvelopedContent (CVE-2015-1790) + o CMS verify infinite loop with unknown hash function (CVE-2015-1792) + o Race condition handling NewSessionTicket (CVE-2015-1791) + + Major changes between OpenSSL 1.0.2 and OpenSSL 1.0.2a [19 Mar 2015] o OpenSSL 1.0.2 ClientHello sigalgs DoS fix (CVE-2015-0291) o Multiblock corrupted pointer fix (CVE-2015-0290) |