#VU21949 Out-of-bounds read in libpcap - CVE-2018-16301

Vulnerability identifier: #VU21949

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16301

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libpcap
Universal components / Libraries / Libraries used by multiple products

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 condition in libpcap when during pcapng reading. A remote attacker can pass specially crafted data to the application that uses the affected library, trigger out-of-bounds read error and read contents of memory on the system or crash the application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libpcap: 0.5.1 - 1.9.0

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External links
https://github.com/the-tcpdump-group/libpcap/blob/libpcap-1.9/CHANGES
https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES

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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.