OpenSSL: Multiple vulnerabilities — GLSA 201503-11

Multiple vulnerabilities have been found in OpenSSL that can result in either Denial of Service or information disclosure.

Affected packages

Package	dev-libs/openssl on all architectures
Affected versions	< 1.0.1l-r1
Unaffected versions	>= 1.0.1l-r1 revision >= 0.9.8z_p5 revision >= 0.9.8z_p6 revision >= 0.9.8z_p7 revision >= 0.9.8z_p8 revision >= 0.9.8z_p9 revision >= 0.9.8z_p10 revision >= 0.9.8z_p11 revision >= 0.9.8z_p12 revision >= 0.9.8z_p13 revision >= 0.9.8z_p14 revision >= 0.9.8z_p15

Background

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general purpose cryptography library.

Description

Multiple vulnerabilities have been found in OpenSSL. Please review the CVE identifiers and the upstream advisory referenced below for details:

RSA silently downgrades to EXPORT_RSA [Client] (Reclassified) (CVE-2015-0204)
Segmentation fault in ASN1_TYPE_cmp (CVE-2015-0286)
ASN.1 structure reuse memory corruption (CVE-2015-0287)
X509_to_X509_REQ NULL pointer deref (CVE-2015-0288)
PKCS7 NULL pointer dereferences (CVE-2015-0289)
Base64 decode (CVE-2015-0292)
DoS via reachable assert in SSLv2 servers (CVE-2015-0293)
Use After Free following d2i_ECPrivatekey error (CVE-2015-0209)

The following issues affect OpenSSL 1.0.2 only which is not part of the supported Gentoo stable tree:

OpenSSL 1.0.2 ClientHello sigalgs DoS (CVE-2015-0291)
Multiblock corrupted pointer (CVE-2015-0290)
Segmentation fault in DTLSv1_listen (CVE-2015-0207)
Segmentation fault for invalid PSS parameters (CVE-2015-0208)
Empty CKE with client auth and DHE (CVE-2015-1787)
Handshake with unseeded PRNG (CVE-2015-0285)

Impact

A remote attacker can utilize multiple vectors to cause Denial of Service or Information Disclosure.

Workaround

There is no known workaround at this time.

Resolution

All OpenSSL 1.0.1 users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1l-r1"

All OpenSSL 0.9.8 users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8z_p5-r1"

Packages which depend on the OpenSSL library need to be restarted for the upgrade to take effect. Some packages may need to be recompiled. Tools such as revdep-rebuild may assist in identifying some of these packages.

References

Release date
March 19, 2015

Latest revision
June 06, 2015: 2

Severity
normal

Exploitable
remote

Bugzilla entries

543552