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openSUSE Security Update : libressl (openSUSE-2017-561)

medium Nessus Plugin ID 100043

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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.

For additional changes please refer to the changelog.

Solution

Update the affected libressl packages.

See Also

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

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

Plugin Details

Severity: Medium

ID: 100043

File Name: openSUSE-2017-561.nasl

Version: 3.5

Type: local

Agent: unix

Published: 5/9/2017

Updated: 12/19/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2016-7056

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:opensuse:libressl, p-cpe:/a:novell:opensuse:libssl43, p-cpe:/a:novell:opensuse:libssl43-debuginfo, p-cpe:/a:novell:opensuse:libtls15-32bit, p-cpe:/a:novell:opensuse:libcrypto41, p-cpe:/a:novell:opensuse:libressl-devel-32bit, p-cpe:/a:novell:opensuse:libtls15-debuginfo-32bit, cpe:/o:novell:opensuse:42.2, p-cpe:/a:novell:opensuse:libressl-debuginfo, p-cpe:/a:novell:opensuse:libressl-debugsource, p-cpe:/a:novell:opensuse:libtls15, p-cpe:/a:novell:opensuse:libressl-devel, p-cpe:/a:novell:opensuse:libssl43-32bit, p-cpe:/a:novell:opensuse:libssl43-debuginfo-32bit, p-cpe:/a:novell:opensuse:libcrypto41-32bit, p-cpe:/a:novell:opensuse:libtls15-debuginfo, p-cpe:/a:novell:opensuse:libcrypto41-debuginfo, p-cpe:/a:novell:opensuse:libcrypto41-debuginfo-32bit

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/8/2017

Reference Information

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