FreeBSD : zeek -- potential DoS vulnerabilities (96d6809a-81df-46d4-87ed-2f78c79f06b1)

high Nessus Plugin ID 174312

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 96d6809a-81df-46d4-87ed-2f78c79f06b1 advisory.

- Tim Wojtulewicz of Corelight reports: Receiving DNS responses from async DNS requests (via A specially-crafted stream of FTP packets containing a command reply with many intermediate lines can cause Zeek to spend a large amount of time processing data. A specially-crafted set of packets containing extremely large file offsets cause cause the reassembler code to allocate large amounts of memory. The DNS manager does not correctly expire responses that don't contain any data, such those containing NXDOMAIN or NODATA status codes. This can lead to Zeek allocating large amounts of memory for these responses and never deallocating them. A specially-crafted stream of RDP packets can cause Zeek to spend large protocol validation. A specially-crafted stream of SMTP packets can cause Zeek to spend large amounts of time processing data. (96d6809a-81df-46d4-87ed-2f78c79f06b1)

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

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 174312

File Name: freebsd_pkg_96d6809a81df46d487ed2f78c79f06b1.nasl

Version: 1.0

Type: local

Family: FreeBSD Local Security Checks

Published: 4/14/2023

Updated: 4/14/2023

Supported Sensors: Nessus

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:zeek, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 4/12/2023

Vulnerability Publication Date: 4/12/2023

Detections

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