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CVE-2018-17204

Status Candidate

Overview

An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting parse_group_prop_ntr_selection_method in lib/ofp-util.c. When decoding a group mod, it validates the group type and command after the whole group mod has been decoded. The OF1.5 decoder, however, tries to use the type and command earlier, when it might still be invalid. This causes an assertion failure (via OVS_NOT_REACHED). ovs-vswitchd does not enable support for OpenFlow 1.5 by default.

Related Files

Ubuntu Security Notice USN-3873-1
Posted Jan 30, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3873-1 - It was discovered that Open vSwitch incorrectly decoded certain packets. A remote attacker could possibly use this issue to cause Open vSwitch to crash, resulting in a denial of service. It was discovered that Open vSwitch incorrectly handled processing certain flows. A remote attacker could possibly use this issue to cause Open vSwitch to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2018-17204, CVE-2018-17205, CVE-2018-17206
SHA-256 | 908ced99153ecc61b1eb36e454bae54f8f456af9c212d3462a5914e555707a01
Red Hat Security Advisory 2019-0081-01
Posted Jan 17, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-0081-01 - Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic. Issues addressed include buffer over-read and assertion failure vulnerabilities.

tags | advisory, remote, vulnerability, protocol
systems | linux, redhat
advisories | CVE-2018-17204, CVE-2018-17205, CVE-2018-17206
SHA-256 | f75b0d16e83426e9dfc3323902017e37f639d875944ce19bbc8e7ecaac16033f
Red Hat Security Advisory 2019-0053-01
Posted Jan 17, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-0053-01 - Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic. Issues addressed include buffer over-read and assertion failure vulnerabilities.

tags | advisory, remote, vulnerability, protocol
systems | linux, redhat
advisories | CVE-2018-17204, CVE-2018-17205, CVE-2018-17206
SHA-256 | 5193edbbd2de71dc0adc69dac65b2b29d569de7e24504569e1e84b574da00c84
Red Hat Security Advisory 2018-3500-01
Posted Nov 5, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-3500-01 - Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic. Issues addressed include a buffer over-read vulnerability.

tags | advisory, remote, protocol
systems | linux, redhat
advisories | CVE-2018-17204, CVE-2018-17205, CVE-2018-17206
SHA-256 | 0d5f60c494cc3604270bf4eaaf205f10c2b734964f2470dcd3070fb4057fce86
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