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Bug 1492593 - (CVE-2017-14497) CVE-2017-14497 kernel: buffer overflow in tpacket_rcv() in net/packet/af_packet.c
CVE-2017-14497 kernel: buffer overflow in tpacket_rcv() in net/packet/af_pack...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170828,repor...
: Security
Depends On: 1492594 1492602
Blocks: 1486438
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Reported: 2017-09-18 05:34 EDT by Vladis Dronov
Modified: 2017-10-10 09:00 EDT (History)
24 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A buffer overflow was discovered in tpacket_rcv() function in the Linux kernel since v4.6-rc1 through v4.13. A number of socket-related syscalls can be made to set up a configuration when each packet received by a network interface can cause writing up to 10 bytes to a kernel memory outside of a kernel buffer. This can cause unspecified kernel data corruption effects, including damage of in-memory and on-disk XFS data.
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RHEL 7.3 requirements from Atomic Host:
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Description Vladis Dronov 2017-09-18 05:34:03 EDT 
A buffer overflow was discovered in tpacket_rcv() function in the Linux kernel since v4.6-rc1 through v4.13. A number of socket-related syscalls can be made to set up a configuration when each packet received by a network interface can cause writing up to 10 bytes to a kernel memory outside of a kernel buffer. This can cause unspecified kernel data corruption effects, including damage of in-memory and on-disk XFS data.

References:

https://marc.info/?l=linux-kernel&m=150394500728906&w=2

https://marc.info/?t=150394517700001&r=1&w=2

http://seclists.org/oss-sec/2017/q3/476

A kernel patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=edbd58be15a957f6a760c4a514cd475217eb97fd
Comment 1 Vladis Dronov 2017-09-18 05:35:02 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1492594]
Comment 3 Vladis Dronov 2017-09-18 05:50:34 EDT 
Statement:

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