openSUSE Security Update : libressl (openSUSE-2017-560)

medium Nessus Plugin ID 100042

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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 openSUSE host is missing a security update.

Description

This update for libressl to version 2.5.1 fixes the following issues :

These security issues were fixed :

- CVE-2016-0702: Prevent side channel attack on modular exponentiation (boo#968050).

- CVE-2016-7056: Avoid a side-channel cache-timing attack that can leak the ECDSA private keys when signing (boo#1019334).

These non-security issues were fixed :

- Detect zero-length encrypted session data early

- Curve25519 Key Exchange support.

- Support for alternate chains for certificate verification.

- Added EVP interface for MD5+SHA1 hashes

- Fixed DTLS client failures when the server sends a certificate request.

- Corrected handling of padding when upgrading an SSLv2 challenge into an SSLv3/TLS connection.

- Allowed protocols and ciphers to be set on a TLS config object in libtls.

Solution

Update the affected libressl packages.

See Also

https://bugzilla.opensuse.org/show_bug.cgi?id=968050

https://bugzilla.opensuse.org/show_bug.cgi?id=1019334

Plugin Details

Severity: Medium

ID: 100042

File Name: openSUSE-2017-560.nasl

Version: 3.4

Type: local

Agent: unix

Published: 5/9/2017

Updated: 1/19/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

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

CVSS v3

Risk Factor: Medium

Base Score: 5.5

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

Vulnerability Information

CPE: cpe:2.3:o:novell:opensuse:42.1:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libressl:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libressl-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libressl-debugsource:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libressl-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libressl-devel-32bit:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libcrypto41:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libcrypto41-32bit:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libcrypto41-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libcrypto41-debuginfo-32bit:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libssl43:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libssl43-32bit:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libssl43-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libssl43-debuginfo-32bit:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libtls15:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libtls15-32bit:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libtls15-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libtls15-debuginfo-32bit:*:*:*:*:*:*:*

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Patch Publication Date: 5/8/2017

Reference Information

CVE: CVE-2016-7056, CVE-2016-0702