Bug 1274256 – CVE-2015-7848 ntp: multiple integer overflow read access violations

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Bug 1274256 - (CVE-2015-7848) CVE-2015-7848 ntp: multiple integer overflow read access violations

Summary:	CVE-2015-7848 ntp: multiple integer overflow read access violations

Status:	CLOSED NOTABUG

Aliases:	CVE-2015-7848

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20151021,repor...
Keywords:	Security

Depends On:
Blocks:	1260670
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Reported:	2015-10-22 07:29 EDT by Martin Prpič
Modified:	2015-10-23 04:19 EDT (History)
CC List:	3 users (show)

See Also:
Fixed In Version:	ntp 4.2.8p4
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-10-23 03:31:15 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Martin Prpič 2015-10-22 07:29:36 EDT

The following flaw was found in ntpd:

When processing a specially crafted private mode packet, an integer overflow can occur leading to out of bounds memory copy operation. The crafted packet needs to have the correct message authentication code and a valid timestamp. When processed by the NTP daemon, it leads to an immediate crash.

External References:

http://talosintel.com/reports/TALOS-2015-0052/
http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner

Comment 1 Martin Prpič 2015-10-23 03:31:15 EDT

Statement:

This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux 5, 6, and 7, as they do not include the affected functionality.

Comment 2 Martin Prpič 2015-10-23 04:19:31 EDT

Upstream patch:

https://github.com/ntp-project/ntp/commit/c04c3d3d940dfe1a53132925c4f51aef017d2e0f

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