Debian DSA-3673-1 : openssl - security update

High Nessus Plugin ID 93668

Synopsis

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

Description

Several vulnerabilities were discovered in OpenSSL :

- CVE-2016-2177 Guido Vranken discovered that OpenSSL uses undefined pointer arithmetic. Additional information can be found at https://www.openssl.org/blog/blog/2016/06/27/undefined-p ointer-arithmetic/

- CVE-2016-2178 Cesar Pereida, Billy Brumley and Yuval Yarom discovered a timing leak in the DSA code.

- CVE-2016-2179 / CVE-2016-2181 Quan Luo and the OCAP audit team discovered denial of service vulnerabilities in DTLS.

- CVE-2016-2180 / CVE-2016-2182 / CVE-2016-6303 Shi Lei discovered an out-of-bounds memory read in TS_OBJ_print_bio() and an out-of-bounds write in BN_bn2dec() and MDC2_Update().

- CVE-2016-2183 DES-based cipher suites are demoted from the HIGH group to MEDIUM as a mitigation for the SWEET32 attack.

- CVE-2016-6302 Shi Lei discovered that the use of SHA512 in TLS session tickets is susceptible to denial of service.

- CVE-2016-6304 Shi Lei discovered that excessively large OCSP status request may result in denial of service via memory exhaustion.

- CVE-2016-6306 Shi Lei discovered that missing message length validation when parsing certificates may potentially result in denial of service.

Solution

Upgrade the openssl packages.

For the stable distribution (jessie), these problems have been fixed in version 1.0.1t-1+deb8u4.

See Also

https://security-tracker.debian.org/tracker/CVE-2016-2177

http://www.nessus.org/u?6824788b

https://security-tracker.debian.org/tracker/CVE-2016-2178

https://security-tracker.debian.org/tracker/CVE-2016-2179

https://security-tracker.debian.org/tracker/CVE-2016-2181

https://security-tracker.debian.org/tracker/CVE-2016-2180

https://security-tracker.debian.org/tracker/CVE-2016-2182

https://security-tracker.debian.org/tracker/CVE-2016-6303

https://security-tracker.debian.org/tracker/CVE-2016-2183

https://security-tracker.debian.org/tracker/CVE-2016-6302

https://security-tracker.debian.org/tracker/CVE-2016-6304

https://security-tracker.debian.org/tracker/CVE-2016-6306

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

https://www.debian.org/security/2016/dsa-3673

Plugin Details

Severity: High

ID: 93668

File Name: debian_DSA-3673.nasl

Version: 2.8

Type: local

Agent: unix

Published: 2016/09/23

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 5.8

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

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

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.5

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

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:8.0

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: 2016/09/22

Reference Information

CVE: CVE-2016-2177, CVE-2016-2178, CVE-2016-2179, CVE-2016-2180, CVE-2016-2181, CVE-2016-2182, CVE-2016-2183, CVE-2016-6302, CVE-2016-6303, CVE-2016-6304, CVE-2016-6306

DSA: 3673