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gentooGentoo FoundationGLSA-201503-11
HistoryMar 19, 2015 - 12:00 a.m.

OpenSSL: Multiple vulnerabilities

2015-03-1900:00:00
Gentoo Foundation
security.gentoo.org
43

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

0.948 High

EPSS

Percentile

99.2%

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.

OSVersionArchitecturePackageVersionFilename
Gentooanyalldev-libs/openssl< 1.0.1l-r1UNKNOWN

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

0.948 High

EPSS

Percentile

99.2%