STIGQter: STIG Summary: VMware vRealize Automation 7.x SLES Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 28 Sep 2018:

The SLES for vRealize must protect against or limit the effects of Denial of Service (DoS) attacks by ensuring the SLES for vRealize is implementing rate-limiting measures on impacted network interfaces.

DISA Rule

SV-100461r1_rule

Vulnerability Number

V-89811

Group Title

SRG-OS-000420-GPOS-00186

Rule Version

VRAU-SL-001305

Severity

CAT I

CCI(s)

• CCI-002385 - The information system protects against or limits the effects of organization-defined types of denial of service attacks by employing organization-defined security safeguards.

Weight

10

Fix Recommendation

Configure the system to use TCP syncookies when experiencing a TCP SYN flood.

Check for the presence of "net.ipv4.tcp_syncookies" in the /etc/sysctl.conf file:

# grep "net.ipv4.tcp_syncookies" /etc/sysctl.conf

If it exists, change the value to "1". If it does not exist, add a setting for tcp_syncookies:

# echo "net.ipv4.tcp_syncookies=1" >> /etc/sysctl.conf

Reload sysctl to verify the new change:

# sysctl -p

Check Contents

Check that the system configured to use TCP syncookies when experiencing a TCP SYN flood.

# cat /proc/sys/net/ipv4/tcp_syncookies

If the result is not "1", this is a finding.

Vulnerability Number

V-89811

Documentable

False

Rule Version

VRAU-SL-001305

Severity Override Guidance

Check that the system configured to use TCP syncookies when experiencing a TCP SYN flood.

# cat /proc/sys/net/ipv4/tcp_syncookies

If the result is not "1", this is a finding.

Check Content Reference

M

Target Key

3459

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