Denial of service in Tcpdump

1) Heap-based buffer overread

EUVDB-ID: #VU9337

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-16808

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to heap-based buffer overread in 'addrtoname.c' when handling malicious input. A remote attacker can supply a specially crafted pcap fil, trigger buffer overread and cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Tcpdump: 4.9.0 - 4.9.2

CPE2.3

• cpe:2.3:a:tcpdump_org:tcpdump:4.9.0:*:*:*:*:*:*:
• cpe:2.3:a:tcpdump_org:tcpdump:4.9.1:*:*:*:*:*:*:
• cpe:2.3:a:tcpdump_org:tcpdump:4.9.2:*:*:*:*:*:*:

External links

http://github.com/the-tcpdump-group/tcpdump/issues/645

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.