Incorrect calculation in wireshark (Alpine package)

1) Incorrect calculation

EUVDB-ID: #VU12719

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-9263

CWE-ID: CWE-682 - Incorrect Calculation

Exploit availability: No

Description

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

The weakness exists in epan/dissectors/packet-kerberos.c due to ensuring a nonzero key length. A remote attacker can trick the victim into opening a specially crafted packet trace file and cause the Kerberos dissector to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wireshark (Alpine package): 2.2.3-r0 - 2.4.5-r0

wireshark (Alpine package):

CPE2.3

• cpe:2.3:a:alpine:wireshark_alpine_package:2.2.3-r0:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:a:alpine:wireshark_alpine_package:2.2.4-r0:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:a:alpine:wireshark_alpine_package:2.2.4-r1:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:a:alpine:wireshark_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=3296b080a93bebe2fa5a42ed0bda9351f68b3f30
https://git.alpinelinux.org/aports/commit/?id=82f356f8c4189cfb0802954a2e20f09baf6a49a0
https://git.alpinelinux.org/aports/commit/?id=ec81538d245e98a04f14f8f9c4dc6cad899c18d3

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.