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Debian DLA-81-1 : openssl security update
high Nessus Plugin ID 82226
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Synopsis
The remote Debian host is missing a security update.Description
Several vulnerabilities have been found in OpenSSL.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.
This does not fix the issue. The proper way to fix this is to disable SSL 3.0.
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.
Note that the package is Debian is not build with this option.
CVE-2014-3569
When openssl is build with the no-ssl3 option and a SSL v3 Client Hello is received the ssl method would be set to NULL which could later result in a NULL pointer dereference.
Note that the package is Debian is not build with this option.
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
Upgrade the affected packages.See Also
https://lists.debian.org/debian-lts-announce/2014/11/msg00000.html
Plugin Details
Severity: High
ID: 82226
File Name: debian_DLA-81.nasl
Version: 1.6
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 3/26/2015
Updated: 1/11/2021
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: High
Base Score: 7.1
Temporal Score: 5.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C
Vulnerability Information
CPE: p-cpe:/a:debian:debian_linux:libssl0.9.8, p-cpe:/a:debian:debian_linux:libssl0.9.8-dbg, p-cpe:/a:debian:debian_linux:libssl-dev, cpe:/o:debian:debian_linux:6.0, p-cpe:/a:debian:debian_linux:libcrypto0.9.8-udeb, p-cpe:/a:debian:debian_linux:openssl
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Ease: No known exploits are available
Patch Publication Date: 11/1/2014