Infinite loop in Debian Linux

1) Infinite loop

EUVDB-ID: #VU33532

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-2017-7700

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

In Wireshark 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11, the NetScaler file parser could go into an infinite loop, triggered by a malformed capture file. This was addressed in wiretap/netscaler.c by ensuring a nonzero record size.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Debian Linux: 8.0

CPE2.3

• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

External links

https://www.securityfocus.com/bid/97631
https://www.securitytracker.com/id/1038262
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13478
https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=8fc0af859de4993951a915ad735be350221f3f53
https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html
https://security.gentoo.org/glsa/201706-12
https://www.wireshark.org/security/wnpa-sec-2017-14.html

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.