FEDORA-EPEL-2016-66faa4ea19

security update in Fedora EPEL 5 for openssl101e

Status: stable 3 years ago
  • A padding oracle flaw was found in the Secure Sockets Layer version 2.0 (SSLv2) protocol. An attacker can potentially use this flaw to decrypt RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol version, allowing them to decrypt such connections. This cross-protocol attack is publicly referred to as DROWN. (CVE-2016-0800)

  • Note: This issue was addressed by disabling the SSLv2 protocol by default when using the 'SSLv23' connection methods, and removing support for weak SSLv2 cipher suites. For more information, refer to the knowledge base article linked to in the References section.

  • A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2 ciphers that have been disabled on the server. This could result in weak SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to man-in-the-middle attacks. (CVE-2015-3197)

  • A side-channel attack was found that makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. An attacker who has the ability to control code in a thread running on the same hyper-threaded core as the victim's thread that is performing decryption, could use this flaw to recover RSA private keys. (CVE-2016-0702)

  • A double-free flaw was found in the way OpenSSL parsed certain malformed DSA (Digital Signature Algorithm) private keys. An attacker could create specially crafted DSA private keys that, when processed by an application compiled against OpenSSL, could cause the application to crash. (CVE-2016-0705)

  • An integer overflow flaw, leading to a NULL pointer dereference or a heap-based memory corruption, was found in the way some BIGNUM functions of OpenSSL were implemented. Applications that use these functions with large untrusted input could crash or, potentially, execute arbitrary code. (CVE-2016-0797)

Reboot Required

After installing this update it is required that you reboot your system to ensure the changes supplied by this update are applied properly.

Comments 5

This update has been submitted for testing by robert.

This update has been pushed to testing.

This update has reached 14 days in testing and can be pushed to stable now if the maintainer wishes

This update has been submitted for stable by robert.

This update has been pushed to stable.

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Content Type
RPM
Status
stable
Test Gating
Submitted by
Update Type
security
Update Severity
high
Karma
0
stable threshold: 1
unstable threshold: -3
Autopush (karma)
Enabled
Autopush (time)
Disabled
Dates
submitted 3 years ago
in testing 3 years ago
in stable 3 years ago

Related Bugs 7

00 #1301846 CVE-2015-3197 OpenSSL: SSLv2 doesn't block disabled ciphers
00 #1302769 CVE-2015-3197 openssl101e: OpenSSL: SSLv2 doesn't block disabled ciphers [epel-5]
00 #1310593 CVE-2016-0800 SSL/TLS: Cross-protocol attack on TLS using SSLv2 (DROWN)
00 #1310596 CVE-2016-0705 OpenSSL: Double-free in DSA code
00 #1310599 CVE-2016-0702 OpenSSL: Side channel attack on modular exponentiation
00 #1311880 CVE-2016-0797 OpenSSL: BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption
00 #1312862 CVE-2016-0705 openssl101e: OpenSSL: Double-free in DSA code [epel-5]

Automated Test Results