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VMware Security Response Center


VMWARE RESPONSE TO CVE-2023-29552 – REFLECTIVE DENIAL-OF-SERVICE (DOS)
AMPLIFICATION VULNERABILITY IN SLP

Edward Hawkins April 25, 2023 1 min read
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Greetings from the VMware Security Response Center!

Today we wanted to address CVE-2023-29552 – a vulnerability in SLP that could
allow for a reflective denial-of-service amplification attack that was disclosed
on April 25th, 2023.

VMware has investigated this vulnerability and determined that currently
supported ESXi releases (ESXi 7.x and 8.x lines) are not impacted.

However, releases that have reached end of general support (EOGS) such as 6.7
and 6.5 have been found to be impacted by CVE-2023-29552. As per previous
guidance and best practice VMware recommends that the best option to address
CVE-2023-29552 is to upgrade to a supported release line that is not impacted by
the vulnerability. ESXi 7.0 U2c and newer, and ESXi 8.0 GA and newer, ship with
the SLP service hardened, disabled by default, and filtered by the ESXi
firewall. In lieu of an upgrade to a supported release, ESXi admins should
ensure that their ESXi hosts are not exposed to untrusted networks and also
disable SLP following the instructions in KB76372.

VMware would like to thank Bitsight and CISA for reporting this vulnerability to
us.

EDWARD HAWKINS

Edward Hawkins is with the VMware Security Response Center working as our
High-Profile Product Incident Response Manager.


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