The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - openvswitch: limitation in the OVS packet parsing in userspace leads to DoS (CVE-2020-35498)

  - openvswitch: Integer Underflow in Organization Specific TLV (CVE-2022-4338)

  - 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. (CVE-2018-17204)

  - An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting ofproto_rule_insert__ in     ofproto/ofproto.c. During bundle commit, flows that are added in a bundle are applied to ofproto in order.
    If a flow cannot be added (e.g., the flow action is a go-to for a group id that does not exist), OvS tries     to revert back all previous flows that were successfully applied from the same bundle. This is possible     since OvS maintains list of old flows that were replaced by flows from the bundle. While reinserting old     flows, OvS has an assertion failure due to a check on rule state != RULE_INITIALIZED. This would work for     new flows, but for an old flow the rule state is RULE_REMOVED. The assertion failure causes an OvS crash.
    (CVE-2018-17205)

  - An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6. The decode_bundle function inside     lib/ofp-actions.c is affected by a buffer over-read issue during BUNDLE action decoding. (CVE-2018-17206)

  - The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote     attackers to cause a denial of service (delays of legitimate traffic) via crafted packet data that     requires excessive evaluation time within the packet classification algorithm for the MegaFlow cache, aka     a Tuple Space Explosion (TSE) attack. (CVE-2019-25076)

  - Open vSwitch (aka openvswitch) 2.11.0 through 2.15.0 has a use-after-free in decode_NXAST_RAW_ENCAP     (called from ofpact_decode and ofpacts_decode) during the decoding of a RAW_ENCAP action. (CVE-2021-36980)

  - A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing. An attacker     could use this flaw to potentially exhaust available memory by keeping sending packet fragments.
    (CVE-2021-3905)

  - An out-of-bounds read in Organization Specific TLV was found in various versions of OpenvSwitch.
    (CVE-2022-4337)

  - A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the     datapath flow without the action modifying the IP header. This issue results (for both kernel and     userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for     this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a !=     0 IP protocol that matches this dp flow. (CVE-2023-1668)

  - A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual     machines to bypass OpenFlow rules. This issue may allow a local attacker to create specially crafted     packets with a modified or spoofed target IP address field that can redirect ICMPv6 traffic to arbitrary     IP addresses. (CVE-2023-5366)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:0081 advisory.

  - openvswitch: Mishandle of group mods in lib/ofp-util.c:parse_group_prop_ntr_selection_method() allows for     assertion failure (CVE-2018-17204)

  - openvswitch: Error during bundle commit in ofproto/ofproto.c:ofproto_rule_insert__() allows for crash     (CVE-2018-17205)

  - openvswitch: Buffer over-read in lib/ofp-actions.c:decode_bundle() (CVE-2018-17206)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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. (CVE-2018-17204)

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. (CVE-2018-17205)

It was discovered that Open vSwitch incorrectly handled BUNDLE action decoding. A remote attacker could possibly use this issue to cause Open vSwitch to crash, resulting in a denial of service.
(CVE-2018-17206).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3500 advisory.

  - openvswitch: Mishandle of group mods in lib/ofp-util.c:parse_group_prop_ntr_selection_method() allows for     assertion failure (CVE-2018-17204)

  - openvswitch: Error during bundle commit in ofproto/ofproto.c:ofproto_rule_insert__() allows for crash     (CVE-2018-17205)

  - openvswitch: Buffer over-read in lib/ofp-actions.c:decode_bundle() (CVE-2018-17206)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:0053 advisory.

  - openvswitch: Mishandle of group mods in lib/ofp-util.c:parse_group_prop_ntr_selection_method() allows for     assertion failure (CVE-2018-17204)

  - openvswitch: Error during bundle commit in ofproto/ofproto.c:ofproto_rule_insert__() allows for crash     (CVE-2018-17205)

  - openvswitch: Buffer over-read in lib/ofp-actions.c:decode_bundle() (CVE-2018-17206)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for openvswitch to version 2.7.6 fixes the following issues :

These security issues were fixed :

  - CVE-2018-17205: Prevent OVS crash when reverting old     flows in bundle commit (bsc#1104467).

  - CVE-2018-17206: Avoid buffer overread in BUNDLE action     decoding (bsc#1104467).

  - CVE-2018-17204:When decoding a group mod, it validated     the group type and command after the whole group mod has     been decoded. The OF1.5 decoder, however, tried to use     the type and command earlier, when it might still be     invalid. This caused an assertion failure (via     OVS_NOT_REACHED) (bsc#1104467).

These non-security issues were fixed :

  - ofproto/bond: Fix bond reconfiguration race condition.

  - ofproto/bond: Fix bond post recirc rule leak.

  - ofproto/bond: fix interal flow leak of tcp-balance bond

  - systemd: Restart openvswitch service if a daemon crashes

  - conntrack: Fix checks for TCP, UDP, and IPv6 header     sizes.

  - ofp-actions: Fix translation of set_field for nw_ecn

  - netdev-dpdk: Fix mempool segfault.

  - ofproto-dpif-upcall: Fix flow setup/delete race.

  - learn: Fix memory leak in learn_parse_sepc()

  - netdev-dpdk: fix mempool_configure error state

  - vswitchd: Add --cleanup option to the 'appctl exit'     command

  - ofp-parse: Fix memory leak on error path in     parse_ofp_group_mod_file().

  - actions: Fix memory leak on error path in     parse_ct_lb_action().

  - dpif-netdev: Fix use-after-free error in     reconfigure_datapath().

  - bridge: Fix memory leak in bridge_aa_update_trunks().

  - dpif-netlink: Fix multiple-free and fd leak on error     path.

  - ofp-print: Avoid array overread in     print_table_instruction_features().

  - flow: Fix buffer overread in flow_hash_symmetric_l3l4().

  - systemd: start vswitchd after udev

  - ofp-util: Check length of buckets in     ofputil_pull_ofp15_group_mod().

  - ovsdb-types: Fix memory leak on error path.

  - tnl-ports: Fix loss of tunneling upon removal of a     single tunnel port.

  - netdev: check for NULL fields in netdev_get_addrs

  - netdev-dpdk: vhost get stats fix.

  - netdev-dpdk: use 64-bit arithmetic when converting     rates.

  - ofp-util: Fix buffer overread in     ofputil_decode_bundle_add().

  - ofp-util: Fix memory leaks on error cases in     ofputil_decode_group_mod().

  - ofp-util: Fix memory leaks when parsing OF1.5 group     properties.

  - ofp-actions: Fix buffer overread in     decode_LEARN_specs().

  - flow: Fix buffer overread for crafted IPv6 packets.

  - ofp-actions: Properly interpret 'output:in_port'.

  - ovs-ofctl: Avoid read overrun in ofperr_decode_msg().

  - odp-util: Avoid misaligned references to ip6_hdr.

  - ofproto-dpif-upcall: Fix action attr iteration.

  - ofproto-dpif-upcall: Fix key attr iteration.

  - netdev-dpdk: vhost get stats fix.

  - netdev-dpdk: use 64-bit arithmetic when converting     rates.

  - ofp-util: Fix buffer overread in     ofputil_decode_bundle_add().

  - ofp-util: Fix memory leaks on error cases in     ofputil_decode_group_mod().

  - ofp-util: Fix memory leaks when parsing OF1.5 group     properties.

  - odp-util: Fix buffer overread in parsing string form of     ODP flows.

  - ovs-vsctl: Fix segfault when attempting to del-port from     parent bridge.

This update was imported from the SUSE:SLE-12-SP3:Update update project.

This update for openvswitch to version 2.7.6 fixes the following issues :

These security issues were fixed :

CVE-2018-17205: Prevent OVS crash when reverting old flows in bundle commit (bsc#1104467).

CVE-2018-17206: Avoid buffer overread in BUNDLE action decoding (bsc#1104467).

CVE-2018-17204: When decoding a group mod, it validated the group type and command after the whole group mod has been decoded. The OF1.5 decoder, however, tried to use the type and command earlier, when it might still be invalid. This caused an assertion failure (via OVS_NOT_REACHED) (bsc#1104467).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
195853	RHEL 8 : openvswitch (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	5/11/2024	5/11/2024	critical
194031	RHEL 7 : openvswitch (RHSA-2019:0081)	Nessus	Red Hat Local Security Checks	4/27/2024	4/27/2024	high
121506	Ubuntu 16.04 LTS / 18.04 LTS : Open vSwitch vulnerabilities (USN-3873-1)	Nessus	Ubuntu Local Security Checks	1/31/2019	10/20/2023	high
118745	RHEL 7 : openvswitch (RHSA-2018:3500)	Nessus	Red Hat Local Security Checks	11/6/2018	4/27/2024	high
194036	RHEL 7 : openvswitch (RHSA-2019:0053)	Nessus	Red Hat Local Security Checks	4/27/2024	4/27/2024	high
119716	openSUSE Security Update : openvswitch (openSUSE-2018-1562)	Nessus	SuSE Local Security Checks	12/17/2018	1/19/2021	high
119720	SUSE SLES12 Security Update : openvswitch (SUSE-SU-2018:4128-1)	Nessus	SuSE Local Security Checks	12/17/2018	3/27/2020	high

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