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amazonAmazonALAS-2012-100
HistoryJul 05, 2012 - 4:19 p.m.

Medium: kernel

2012-07-0516:19:00
alas.aws.amazon.com
22

4.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

0.003 Low

EPSS

Percentile

64.4%

Issue Overview:

A flaw was found in the way the Linux kernel’s Event Poll (epoll) subsystem handled large, nested epoll structures. A local, unprivileged user could use this flaw to cause a denial of service.

A malicious Network File System version 4 (NFSv4) server could return a crafted reply to a GETACL request, causing a denial of service on the client.

The rds_ib_xmit function in net/rds/ib_send.c in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel 3.7.4 and earlier allows local users to cause a denial of service (BUG_ON and kernel panic) by establishing an RDS connection with the source IP address equal to the IPoIB interface’s own IP address, as demonstrated by rds-ping.

Affected Packages:

kernel

Issue Correction:
Run yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.

New Packages:

i686:  
    kernel-tools-debuginfo-3.2.22-35.60.amzn1.i686  
    kernel-headers-3.2.22-35.60.amzn1.i686  
    kernel-tools-3.2.22-35.60.amzn1.i686  
    kernel-devel-3.2.22-35.60.amzn1.i686  
    kernel-debuginfo-3.2.22-35.60.amzn1.i686  
    kernel-3.2.22-35.60.amzn1.i686  
    kernel-debuginfo-common-i686-3.2.22-35.60.amzn1.i686  
  
noarch:  
    kernel-doc-3.2.22-35.60.amzn1.noarch  
  
src:  
    kernel-3.2.22-35.60.amzn1.src  
  
x86_64:  
    kernel-tools-debuginfo-3.2.22-35.60.amzn1.x86_64  
    kernel-tools-3.2.22-35.60.amzn1.x86_64  
    kernel-devel-3.2.22-35.60.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-3.2.22-35.60.amzn1.x86_64  
    kernel-debuginfo-3.2.22-35.60.amzn1.x86_64  
    kernel-3.2.22-35.60.amzn1.x86_64  
    kernel-headers-3.2.22-35.60.amzn1.x86_64  

Additional References

Red Hat: CVE-2011-1083, CVE-2011-4131, CVE-2012-2372

Mitre: CVE-2011-1083, CVE-2011-4131, CVE-2012-2372

4.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

0.003 Low

EPSS

Percentile

64.4%