Out-of-bounds read in tcpdump (Alpine package)

1) Out-of-bounds read

EUVDB-ID: #VU21985

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14461

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition in print-ldp.c:ldp_tlv_print() within the LDP parser. A remote attacker can generate specially crafted LDP data, trigger out-of-bounds read error and perform denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

tcpdump (Alpine package): 4.9.2-r4

CPE2.3

• cpe:2.3:o:alpine:tcpdump_alpine_package:4.9.2-r4:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=dd5d221102dfcc65b44c43c915d134e830e8d599
http://git.alpinelinux.org/aports/commit/?id=552c3620773db0fb6a4d1e714eaa49b6a16de052
http://git.alpinelinux.org/aports/commit/?id=e3e3e3952958b31bf6f3e01e6c73b30e3e126745

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.