Debian DSA-3053-1 : openssl - security update (POODLE)

High Nessus Plugin ID 78520

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities have been found in OpenSSL, the Secure Sockets Layer library and toolkit.

- CVE-2014-3513 A memory leak flaw was found in the way OpenSSL parsed the DTLS Secure Real-time Transport Protocol (SRTP) extension data. A remote attacker could send multiple specially crafted handshake messages to exhaust all available memory of an SSL/TLS or DTLS server.

- CVE-2014-3566 ('POODLE') A flaw was found in the way SSL 3.0 handled padding bytes when decrypting messages encrypted using block ciphers in cipher block chaining (CBC) mode. This flaw allows a man-in-the-middle (MITM) attacker to decrypt a selected byte of a cipher text in as few as 256 tries if they are able to force a victim application to repeatedly send the same data over newly created SSL 3.0 connections.

This update adds support for Fallback SCSV to mitigate this issue.

- CVE-2014-3567 A memory leak flaw was found in the way an OpenSSL handled failed session ticket integrity checks. A remote attacker could exhaust all available memory of an SSL/TLS or DTLS server by sending a large number of invalid session tickets to that server.

- CVE-2014-3568 When OpenSSL is configured with 'no-ssl3' as a build option, servers could accept and complete a SSL 3.0 handshake, and clients could be configured to send them.

Solution

Upgrade the openssl packages.

For the stable distribution (wheezy), these problems have been fixed in version 1.0.1e-2+deb7u13.

See Also

https://security-tracker.debian.org/tracker/CVE-2014-3513

https://security-tracker.debian.org/tracker/CVE-2014-3566

https://security-tracker.debian.org/tracker/CVE-2014-3567

https://security-tracker.debian.org/tracker/CVE-2014-3568

https://packages.debian.org/source/wheezy/openssl

https://www.debian.org/security/2014/dsa-3053

Plugin Details

Severity: High

ID: 78520

File Name: debian_DSA-3053.nasl

Version: 1.23

Type: local

Agent: unix

Published: 2014/10/17

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:openssl, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/10/16

Reference Information

CVE: CVE-2014-3513, CVE-2014-3566, CVE-2014-3567, CVE-2014-3568

BID: 70574, 70584, 70585, 70586

DSA: 3053