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
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2015-7848
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1260670
TreeView+ depends on / blocked
 
Reported: 2015-10-22 11:29 UTC by Martin Prpič
Modified: 2021-02-17 04:48 UTC (History)
3 users (show)

Fixed In Version: ntp 4.2.8p4
Clone Of:
Environment:
Last Closed: 2015-10-23 07:31:15 UTC
Embargoed:

Attachments (Terms of Use)

Description Martin Prpič 2015-10-22 11:29:36 UTC 
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 07:31:15 UTC 
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 08:19:31 UTC 
Upstream patch:

https://github.com/ntp-project/ntp/commit/c04c3d3d940dfe1a53132925c4f51aef017d2e0f
Note You need to log in before you can comment on or make changes to this bug.