Bug 1302219 (CVE-2016-2070) - CVE-2016-2070 kernel: potential division by zero in TCP code
Summary: CVE-2016-2070 kernel: potential division by zero in TCP code
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-2070
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: 1302673
Blocks: 1302222
TreeView+ depends on / blocked
 
Reported: 2016-01-27 08:55 UTC by Andrej Nemec
Modified: 2021-02-17 04:25 UTC (History)
16 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A divide-by-zero vulnerability was found in a way the kernel processes TCP connections. The error can occur if a connection starts another cwnd reduction phase by setting tp->prior_cwnd to the current cwnd (0) in tcp_init_cwnd_reduction(). A remote, unauthenticated attacker could use this flaw to crash the kernel (denial of service).
Clone Of:
Environment:
Last Closed: 2016-01-28 11:27:28 UTC
Embargoed:

Attachments (Terms of Use)

Description Andrej Nemec 2016-01-27 08:55:24 UTC 
A divide-by-zero vulnerability was found in a way the kernel processes TCP connections. The error can occur if a connection starts another cwnd reduction phase by setting tp->prior_cwnd to the current cwnd (0) in tcp_init_cwnd_reduction(). A remote, unauthenticated attacker could use this flaw to crash the kernel (denial of service).

Original bug report:

https://lkml.org/lkml/2015/12/21/435

Oss-security reference:

http://seclists.org/oss-sec/2016/q1/198

CVE assignment:

http://seclists.org/oss-sec/2016/q1/211

Upstream fix:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b8a321ff72c785ed5e8b4cf6eda20b35d427390
Comment 2 Vladis Dronov 2016-01-28 11:23:04 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1302673]
Comment 3 Vladis Dronov 2016-01-28 11:27:04 UTC 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2 as the code with the flaw is not present in the products listed.
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