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amazonAmazonALAS-2020-1458
HistoryDec 16, 2020 - 8:31 p.m.

Low: dnsmasq

2020-12-1620:31:00
alas.aws.amazon.com
12

3.7 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.003 Low

EPSS

Percentile

71.4%

Issue Overview:

A flaw was found in the Dnsmasq application where a remote attacker can trigger a memory leak by sending specially crafted DHCP responses to the server. A successful attack is dependent on a specific configuration regarding the domain name set into the dnsmasq.conf file. Over time, the memory leak may cause the process to run out of memory and terminate, causing a denial of service. (CVE-2019-14834)

Affected Packages:

dnsmasq

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

New Packages:

i686:  
    dnsmasq-debuginfo-2.76-16.16.amzn1.i686  
    dnsmasq-utils-2.76-16.16.amzn1.i686  
    dnsmasq-2.76-16.16.amzn1.i686  
  
src:  
    dnsmasq-2.76-16.16.amzn1.src  
  
x86_64:  
    dnsmasq-utils-2.76-16.16.amzn1.x86_64  
    dnsmasq-2.76-16.16.amzn1.x86_64  
    dnsmasq-debuginfo-2.76-16.16.amzn1.x86_64  

Additional References

Red Hat: CVE-2019-14834

Mitre: CVE-2019-14834

3.7 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.003 Low

EPSS

Percentile

71.4%