Debian LTS: Security Advisory for openvswitch (DLA-2571-1)

Published: 2021-02-20 04:00:17
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Summary:
The remote host is missing an update for the 'openvswitch' Linux Distribution Package(s) announced via the DLA-2571-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
Several issues have been found in openvswitch, a production quality, multilayer, software-based, Ethernet virtual switch. CVE-2020-35498 Denial of service attacks, in which crafted network packets could cause the packet lookup to ignore network header fields from layers 3 and 4. The crafted network packet is an ordinary IPv4 or IPv6 packet with Ethernet padding length above 255 bytes. This causes the packet sanity check to abort parsing header fields after layer 2. CVE-2020-27827 Denial of service attacks using crafted LLDP packets. CVE-2018-17206 Buffer over-read issue during BUNDLE action decoding. CVE-2018-17204 Assertion failure due to not validating information (group type and command) in OF1.5 decoder. CVE-2017-9214 Buffer over-read that is caused by an unsigned integer underflow. CVE-2015-8011 Buffer overflow in the lldp_decode function in daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via vectors involving large management addresses and TLV boundaries.

Affected Versions:
'openvswitch' Linux Distribution Package(s) on Debian Linux.

Recommendations:
For Debian 9 stretch, these problems have been fixed in version 2.6.10-0+deb9u1. This version is a new upstream point release. We recommend that you upgrade your openvswitch Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-8011
https://nvd.nist.gov/vuln/detail/CVE-2017-9214
https://nvd.nist.gov/vuln/detail/CVE-2018-17204
https://nvd.nist.gov/vuln/detail/CVE-2018-17206
https://nvd.nist.gov/vuln/detail/CVE-2020-27827
https://nvd.nist.gov/vuln/detail/CVE-2020-35498

References:

https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html
https://security-tracker.debian.org/tracker/DLA-2571-1

Severity
High
CVSS Score
7.8
Published
2021-02-20
Modified
2021-02-22
Category
Debian Local Security Checks

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