Data Handling in NTP

1) Data Handling

EUVDB-ID: #VU54027

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

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

CPE2.3

• cpe:2.3:a:ntp_org:ntp:4.2.8p1:*:*:*:*:*:*:*
• cpe:2.3:a:ntp_org:ntp:4.2.8p2:*:*:*:*:*:*:*
• cpe:2.3:a:ntp_org:ntp:4.2.8p3:*:*:*:*:*:*:*

External links

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