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amazonAmazonALAS-2017-823
HistoryApr 27, 2017 - 12:00 a.m.

Medium: util-linux

2017-04-2700:00:00
alas.aws.amazon.com
12

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

4.7 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.3%

Issue Overview:

Sending SIGKILL to other processes with root privileges via su:
A race condition was found in the way su handled the management of child processes. A local authenticated attacker could use this flaw to kill other processes with root privileges under specific conditions.(CVE-2017-2616)

Affected Packages:

util-linux

Issue Correction:
Run yum update util-linux to update your system.

New Packages:

i686:  
    util-linux-2.23.2-33.28.amzn1.i686  
    libblkid-devel-2.23.2-33.28.amzn1.i686  
    libuuid-2.23.2-33.28.amzn1.i686  
    uuidd-2.23.2-33.28.amzn1.i686  
    libmount-devel-2.23.2-33.28.amzn1.i686  
    util-linux-debuginfo-2.23.2-33.28.amzn1.i686  
    libuuid-devel-2.23.2-33.28.amzn1.i686  
    libblkid-2.23.2-33.28.amzn1.i686  
    libmount-2.23.2-33.28.amzn1.i686  
  
src:  
    util-linux-2.23.2-33.28.amzn1.src  
  
x86_64:  
    libuuid-devel-2.23.2-33.28.amzn1.x86_64  
    libblkid-2.23.2-33.28.amzn1.x86_64  
    util-linux-2.23.2-33.28.amzn1.x86_64  
    libmount-2.23.2-33.28.amzn1.x86_64  
    libblkid-devel-2.23.2-33.28.amzn1.x86_64  
    libuuid-2.23.2-33.28.amzn1.x86_64  
    util-linux-debuginfo-2.23.2-33.28.amzn1.x86_64  
    uuidd-2.23.2-33.28.amzn1.x86_64  
    libmount-devel-2.23.2-33.28.amzn1.x86_64  

Additional References

Red Hat: CVE-2017-2616

Mitre: CVE-2017-2616

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

4.7 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.3%