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openSUSE Security Update : openvpn (openSUSE-2017-730)
high Nessus Plugin ID 101131
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Synopsis
The remote openSUSE host is missing a security update.Description
This update for openvpn fixes the following issues :- Some parts of the certificate-parsing code did not always clear all allocated memory. This would have allowed clients to leak a few bytes of memory for each connection attempt, thereby facilitating a (quite inefficient) DoS attack on the server. [bsc#1044947, CVE-2017-7521]
- The ASN1 parsing code contained a bug that could have resulted in some buffers being free()d twice, and this issue could have potentially been triggered remotely by a VPN peer. [bsc#1044947, CVE-2017-7521]
- If clients used a HTTP proxy with NTLM authentication, a man-in-the-middle attacker between client and proxy could cause the client to crash or disclose at most 96 bytes of stack memory. The disclosed stack memory was likely to contain the proxy password. If the proxy password had not been reused, this was unlikely to compromise the security of the OpenVPN tunnel itself.
Clients who did not use the --http-proxy option with ntlm2 authentication were not affected. [bsc#1044947, CVE-2017-7520]
- It was possible to trigger an assertion by sending a malformed IPv6 packet. That issue could have been abused to remotely shutdown an openvpn server or client, if IPv6 and --mssfix were enabled and if the IPv6 networks used inside the VPN were known. [bsc#1044947, CVE-2017-7508]
This update was imported from the SUSE:SLE-12:Update update project.
Solution
Update the affected openvpn packages.See Also
Plugin Details
Severity: High
ID: 101131
File Name: openSUSE-2017-730.nasl
Version: 3.8
Type: local
Agent: unix
Family: SuSE Local Security Checks
Published: 6/30/2017
Updated: 1/19/2021
Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.2
CVSS v2
Risk Factor: Medium
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS v3
Risk Factor: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Information
CPE: p-cpe:/a:novell:opensuse:openvpn-debugsource, p-cpe:/a:novell:opensuse:openvpn-auth-pam-plugin, p-cpe:/a:novell:opensuse:openvpn-debuginfo, p-cpe:/a:novell:opensuse:openvpn-down-root-plugin, p-cpe:/a:novell:opensuse:openvpn-down-root-plugin-debuginfo, cpe:/o:novell:opensuse:42.2, p-cpe:/a:novell:opensuse:openvpn-devel, p-cpe:/a:novell:opensuse:openvpn, p-cpe:/a:novell:opensuse:openvpn-auth-pam-plugin-debuginfo
Required KB Items: Host/local_checks_enabled, Host/SuSE/release, Host/SuSE/rpm-list, Host/cpu
Patch Publication Date: 6/26/2017