[security-announce] SUSE-SU-2017:2043-1: important: Security update for Linux Kernel Live Patch 3 for SLE 12 SP2

[news 28]

SUSE Security Update: Security update for Linux Kernel Live Patch 3 for SLE 12 SP2

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Announcement ID: SUSE-SU-2017:2043-1

Rating: important

References: #1027575 #1038564 #1042364 #1042892 #1046191

#1046202 #1046206 #1050751

Cross-References: CVE-2017-2636 CVE-2017-7533 CVE-2017-7645

CVE-2017-8797 CVE-2017-8890 CVE-2017-9077

CVE-2017-9242

Affected Products:

SUSE Linux Enterprise Live Patching 12

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An update that solves 7 vulnerabilities and has one errata

is now available.

 

Description:

 

This update for the Linux Kernel 4.4.21-90 fixes several issues.

 

The following security bugs were fixed:

 

- CVE-2017-7533: A bug in inotify code allowed local users to escalate

privilege (bsc#1050751).

- CVE-2017-8797: The NFSv4 server in the Linux kernel did not properly

validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or

LAYOUTGET operand in a UDP packet from a remote attacker. This type

value is uninitialized upon encountering certain error conditions. This

value is used as an array index for dereferencing, which leads to an

OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system

(bsc#1046202)

- CVE-2017-7645: The NFSv2/NFSv3 server in the nfsd subsystem in the Linux

kernel allowed remote attackers to cause a denial of service (system

crash) via a long RPC reply, related to net/sunrpc/svc.c,

fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c (bsc#1046191).

- CVE-2017-2636: Race condition in drivers/tty/n_hdlc.c in the Linux

kernel allowed local users to gain privileges or cause a denial of

service (double free) by setting the HDLC line discipline (bsc#1027575).

- CVE-2017-9242: The __ip6_append_data function in net/ipv6/ip6_output.c

in the Linux kernel is too late in checking whether an overwrite of an

skb data structure may occur, which allowed local users to cause a

denial of service (system crash) via crafted system calls (bsc#1042892).

- CVE-2017-9077: The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c

in the Linux kernel mishandled inheritance, which allowed local users to

cause a denial of service or possibly have unspecified other impact via

crafted system calls, a related issue to CVE-2017-8890 (bsc#1042364).

- CVE-2017-8890: The inet_csk_clone_lock function in

net/ipv4/inet_connection_sock.c in the Linux kernel allowed attackers to

cause a denial of service (double free) or possibly have unspecified

other impact by leveraging use of the accept system call (bsc#1038564).

 

 

Patch Instructions:

 

To install this SUSE Security Update use YaST online_update.

Alternatively you can run the command listed for your product:

 

- SUSE Linux Enterprise Live Patching 12:

 

zypper in -t patch SUSE-SLE-Live-Patching-12-2017-1257=1

 

To bring your system up-to-date, use "zypper patch".

 

 

Package List:

 

- SUSE Linux Enterprise Live Patching 12 (x86_64):

 

kgraft-patch-4_4_21-90-default-7-2.1

 

 

References:

 

https://www.suse.com/security/cve/CVE-2017-2636.html

https://www.suse.com/security/cve/CVE-2017-7533.html

https://www.suse.com/security/cve/CVE-2017-7645.html

https://www.suse.com/security/cve/CVE-2017-8797.html

https://www.suse.com/security/cve/CVE-2017-8890.html

https://www.suse.com/security/cve/CVE-2017-9077.html

https://www.suse.com/security/cve/CVE-2017-9242.html

https://bugzilla.suse.com/1027575

https://bugzilla.suse.com/1038564

https://bugzilla.suse.com/1042364

https://bugzilla.suse.com/1042892

https://bugzilla.suse.com/1046191

https://bugzilla.suse.com/1046202

https://bugzilla.suse.com/1046206

https://bugzilla.suse.com/1050751

 

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