Debian DSA-4157-1 : openssl - security update

medium Nessus Plugin ID 108730
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

Multiple vulnerabilities have been discovered in OpenSSL, a Secure Sockets Layer toolkit. The Common Vulnerabilities and Exposures project identifies the following issues :

- CVE-2017-3738 David Benjamin of Google reported an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli.

- CVE-2018-0739 It was discovered that constructed ASN.1 types with a recursive definition could exceed the stack, potentially leading to a denial of service.

Details can be found in the upstream advisory:
https://www.openssl.org/news/secadv/20180327.txt

Solution

Upgrade the openssl packages.

For the oldstable distribution (jessie), these problems have been fixed in version 1.0.1t-1+deb8u8. The oldstable distribution is not affected by CVE-2017-3738.

For the stable distribution (stretch), these problems have been fixed in version 1.1.0f-3+deb9u2.

See Also

https://security-tracker.debian.org/tracker/CVE-2017-3738

https://security-tracker.debian.org/tracker/CVE-2018-0739

https://www.openssl.org/news/secadv/20180327.txt

https://security-tracker.debian.org/tracker/CVE-2017-3738

https://security-tracker.debian.org/tracker/source-package/openssl

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

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

https://www.debian.org/security/2018/dsa-4157

Plugin Details

Severity: Medium

ID: 108730

File Name: debian_DSA-4157.nasl

Version: 1.6

Type: local

Agent: unix

Published: 3/30/2018

Updated: 11/13/2018

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS v3

Risk Factor: Medium

Base Score: 6.5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:openssl, cpe:/o:debian:debian_linux:8.0, cpe:/o:debian:debian_linux:9.0

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

Patch Publication Date: 3/29/2018

Reference Information

CVE: CVE-2017-3738, CVE-2018-0739

DSA: 4157