Infinite Loop in DNS Decode Capabilities of Tcpdump

vendor:

Tcpdump

by:

SecurityFocus

7.5

CVSS

HIGH

Buffer Overflow

119

CWE

Product Name: Tcpdump

Affected Version From: N/A

Affected Version To: N/A

Patch Exists: Yes

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: N/A

2002

Infinite Loop in DNS Decode Capabilities of Tcpdump

A vulnerability exists in the DNS decode capabilities provided as part of the tcpdump sniffer, from LBL, as well as other sniffers, including Ethereal, by Gerald Combs. These sniffers will attempt to decode DNS request and queries. However, due to the DNS name compression scheme, it is possible to create a DNS packet such that tcpdump will be caught in an infinite loop, while trying to decompress. This will prevent the sniffer from displaying further packets. If tcpdump is being used as some part of and intrusion detection system, this could allow an intruder to evade this system.

Mitigation:

Upgrade to the latest version of tcpdump and ensure that the DNS name compression scheme is disabled.

Source

Exploit-DB raw data:

source: https://www.securityfocus.com/bid/1165/info
 
A vulnerability exists in the DNS decode capabilities provided as part of the tcpdump sniffer, from LBL, as well as other sniffers, including Ethereal, by Gerald Combs. These sniffers will attempt to decode DNS request and queries. However, due to the DNS name compression scheme, it is possible to create a DNS packet such that tcpdump will be caught in an infinite loop, while trying to decompress. This will prevent the sniffer from displaying further packets. If tcpdump is being used as some part of and intrusion detection system, this could allow an intruder to evade this system.
 
When tcpdump is logging to a file, it is not affected by this vulnerability. Upon reading from a file which contains recorded packets, it will enter an infinite loop when it encounters packets of this type.

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/19892.tar.gz