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amazonAmazonALAS-2021-1478
HistoryJan 26, 2021 - 12:11 a.m.

Important: sudo

2021-01-2600:11:00
alas.aws.amazon.com
111

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.971 High

EPSS

Percentile

99.7%

JSON

Issue Overview:

When sudo runs a command in shell mode, either via the -s or -i command line option, it escapes special characters in the command’s arguments with a backslash. The sudoers policy plugin will then remove the escape characters from the arguments before evaluating the sudoers policy (which doesn’t expect the escape characters) if the command is being run in shell mode. (CVE-2021-3156)

Affected Packages:

sudo

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

New Packages:

i686:  
    sudo-debuginfo-1.8.23-9.56.amzn1.i686  
    sudo-devel-1.8.23-9.56.amzn1.i686  
    sudo-1.8.23-9.56.amzn1.i686  
  
src:  
    sudo-1.8.23-9.56.amzn1.src  
  
x86_64:  
    sudo-1.8.23-9.56.amzn1.x86_64  
    sudo-devel-1.8.23-9.56.amzn1.x86_64  
    sudo-debuginfo-1.8.23-9.56.amzn1.x86_64

Additional References

Red Hat: CVE-2021-3156

Mitre: CVE-2021-3156

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7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.971 High

EPSS

Percentile

99.7%

JSON
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