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Bug 1535110 - (CVE-2018-5703) CVE-2018-5703 kernel: net/ipv6/tcp_ipv6.c:tcp_v6_syn_recv_sock function allows attackers to cause a denial of service
CVE-2018-5703 kernel: net/ipv6/tcp_ipv6.c:tcp_v6_syn_recv_sock function allow...
Status: CLOSED NOTABUG
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=20180103,repor...
: Security
Depends On: 1535111 1535112
Blocks: 1535117
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Reported: 2018-01-16 11:11 EST by Adam Mariš
Modified: 2018-02-18 19:54 EST (History)
49 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel, through 4.14.11, allows attackers to cause a denial of service (slab out-of-bounds write) or possibly have unspecified other impact via vectors involving in-kernel TLS implementation. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.
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Clone Of:
Environment:
Last Closed: 2018-02-13 03:42:46 EST
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2018-01-16 11:11:43 EST 
The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.14.11 allows attackers to cause a denial of service (slab out-of-bounds write) or possibly have unspecified other impact via vectors involving in-kernel TLS implementation. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.

References:

https://groups.google.com/forum/#!msg/syzkaller-bugs/0PBeVnSzfqQ/5eXAlM46BQAJ

https://patchwork.ozlabs.org/patch/801530/
Comment 1 Adam Mariš 2018-01-16 11:16:10 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1535111]
Comment 6 Eric Christensen 2018-02-13 12:02:58 EST 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, and 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE. The code of in-kernel TLS implementation with the flaw is not enabled and is not built in the products listed.
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