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amazonAmazonALAS-2018-1008
HistoryMay 10, 2018 - 4:52 p.m.

Important: patch

2018-05-1016:52:00
alas.aws.amazon.com
19

9.3 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.016 Low

EPSS

Percentile

87.5%

Issue Overview:

Malicious patch files cause ed to execute arbitrary commands
GNU Patch version 2.7.6 contains an input validation vulnerability when processing patch files, specifically the EDITOR_PROGRAM invocation (using ed) can result in code execution. This attack appear to be exploitable via a patch file processed via the patch utility. This is similar to FreeBSD’s CVE-2015-1418 however although they share a common ancestry the code bases have diverged over time.(CVE-2018-1000156)

Affected Packages:

patch

Issue Correction:
Run yum update patch to update your system.

New Packages:

i686:  
    patch-debuginfo-2.7.1-10.10.amzn1.i686  
    patch-2.7.1-10.10.amzn1.i686  
  
src:  
    patch-2.7.1-10.10.amzn1.src  
  
x86_64:  
    patch-2.7.1-10.10.amzn1.x86_64  
    patch-debuginfo-2.7.1-10.10.amzn1.x86_64  

Additional References

Red Hat: CVE-2018-1000156

Mitre: CVE-2018-1000156

9.3 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.016 Low

EPSS

Percentile

87.5%