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amazonAmazonALAS-2021-1545
HistoryOct 29, 2021 - 4:37 p.m.

Medium: c-ares

2021-10-2916:37:00
alas.aws.amazon.com
21

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

5.6 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

0.002 Low

EPSS

Percentile

53.0%

JSON

Issue Overview:

A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability. (CVE-2021-3672)

Affected Packages:

c-ares

Issue Correction:
Run yum update c-ares to update your system.

New Packages:

i686:  
    c-ares-debuginfo-1.17.2-1.8.amzn1.i686  
    c-ares-devel-1.17.2-1.8.amzn1.i686  
    c-ares-1.17.2-1.8.amzn1.i686  
  
src:  
    c-ares-1.17.2-1.8.amzn1.src  
  
x86_64:  
    c-ares-devel-1.17.2-1.8.amzn1.x86_64  
    c-ares-1.17.2-1.8.amzn1.x86_64  
    c-ares-debuginfo-1.17.2-1.8.amzn1.x86_64

Additional References

Red Hat: CVE-2021-3672

Mitre: CVE-2021-3672

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6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

5.6 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

0.002 Low

EPSS

Percentile

53.0%

JSON
Related for ALAS-2021-1545
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