#VU22018 Out-of-bounds read in Tcpdump - CVE-2018-16230

Vulnerability identifier: #VU22018

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16230

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Tcpdump
Server applications / DLP, anti-spam, sniffers

Vendor: Tcpdump.org

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the print-bgp.c:bgp_attr_print() (MP_REACH_NLRI) within the BGP parser in tcpdump before 4.9.3. A remote attacker can generate specially crafted data, trigger out-of-bounds read error and perform denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Tcpdump: 4.9.0 - 4.9.2

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External links
https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES
https://github.com/the-tcpdump-group/tcpdump/commit/13d52e9c0e7caf7e6325b0051bc90a49968be67f
https://lists.debian.org/debian-lts-announce/2019/10/msg00015.html

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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.