Data Handling in NTP

1) Data Handling

EUVDB-ID: #VU54027

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-1548

CWE-ID: CWE-19 - Data Handling

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper data handling. A remote attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. 

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ntp: 4.2.8p1 - 4.2.8p4

External links

http://www.talosintelligence.com/reports/TALOS-2016-0082/
http://www.securityfocus.com/bid/88264
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://security.gentoo.org/glsa/201607-15
http://www.securitytracker.com/id/1035705
http://www.debian.org/security/2016/dsa-3629
http://security.netapp.com/advisory/ntap-20171004-0002/
http://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
http://access.redhat.com/errata/RHSA-2016:1141
http://rhn.redhat.com/errata/RHSA-2016-1552.html
http://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
http://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
http://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf

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.