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CVE-2015-7855

Date: August 7, 2017

The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.

Severity Score

6.5

Related Resources (15)

Url: https://security.netapp.com/advisory/ntap-20171004-0001/

Url: http://www.debian.org/security/2015/dsa-3388

Url: https://security-tracker.debian.org/tracker/CVE-2015-7855

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2015-7855

Url: https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11

Url: https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf

Url: http://www.securityfocus.com/bid/77283

Url: https://security.gentoo.org/glsa/201607-15

Url: http://www.securitytracker.com/id/1033951

Url: https://nvd.nist.gov/vuln/detail/CVE-2015-7855

Url: https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839

Url: https://www.exploit-db.com/exploits/40840/

Url: https://bugzilla.redhat.com/show_bug.cgi?id=1274264

Url: http://support.ntp.org/bin/view/Main/NtpBug2922

Url: https://www.mend.io/vulnerability-database/CVE-2015-7855

Severity Score

6.5

Weakness Type (CWE)

Input Validation

CWE-20

CVSS v3.1

Base Score:	6.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	LOW
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	4.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	SINGLE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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