FreeBSD up to 11.2/11.3/12.0 Packet Filter ICMPv6 Packet input validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in FreeBSD up to 11.2/11.3/12.0. The impacted element is an unknown function of the component Packet Filter. Performing a manipulation as part of ICMPv6 Packet results in input validation. This vulnerability is reported as CVE-2019-5598. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in FreeBSD up to 11.2/11.3/12.0 (Operating System). It has been classified as critical. This affects an unknown functionality of the component Packet Filter. The manipulation as part of a ICMPv6 Packet leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In FreeBSD 11.3-PRERELEASE before r345378, 12.0-STABLE before r345377, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in pf does not check if the outer ICMP or ICMP6 packet has the same destination IP as the source IP of the inner protocol packet allowing a maliciously crafted ICMP/ICMP6 packet could bypass the packet filter rules and be passed to a host that would otherwise be unavailable.

The bug was discovered 05/14/2019. The weakness was disclosed 05/15/2019 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2019-5598 since 01/07/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

Applying a patch is able to eliminate this problem.

The entries VDB-135086, VDB-138138 and VDB-138141 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Operating System

Name

• FreeBSD

Version

• 11.0
• 11.1
• 11.2
• 11.3
• 12.0

License

• open-source

Website

• Product: https://www.freebsd.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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