CVE-2019-5544: VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
Published Nov 28, 2019
·Updated
A heap overflow vulnerability was found in openslp, that may result in remote code execution.
Other sources
OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.
— NVD
VMware ESXi and Horizon Desktop as a Service (DaaS) OpenSLP contains a heap-based buffer overflow vulnerability that allows an attacker with network access to port 427 to overwrite the heap of the OpenSLP service to perform remote code execution.
— CISA
Affected Software
263 affected components
VMware VMware ESXi and Horizon DaaS
VMware Horizon DaaS>=8.0.0<9.0.0.0
VMware ESXi=6.0
VMware ESXi=6.0-1
VMware ESXi=6.0-1a
VMware ESXi=6.0-1b
VMware ESXi=6.0-2
VMware ESXi=6.0-3
VMware ESXi=6.0-3a
VMware ESXi=6.0-600-201504401
VMware ESXi=6.0-600-201505401
VMware ESXi=6.0-600-201507101
VMware ESXi=6.0-600-201507102
VMware ESXi=6.0-600-201507401
VMware ESXi=6.0-600-201507402
VMware ESXi=6.0-600-201507403
VMware ESXi=6.0-600-201507404
VMware ESXi=6.0-600-201507405
VMware ESXi=6.0-600-201507406
VMware ESXi=6.0-600-201507407
VMware ESXi=6.0-600-201509101
VMware ESXi=6.0-600-201509102
VMware ESXi=6.0-600-201509201
VMware ESXi=6.0-600-201509202
VMware ESXi=6.0-600-201509203
VMware ESXi=6.0-600-201509204
VMware ESXi=6.0-600-201509205
VMware ESXi=6.0-600-201509206
VMware ESXi=6.0-600-201509207
VMware ESXi=6.0-600-201509208
VMware ESXi=6.0-600-201509209
VMware ESXi=6.0-600-201509210
VMware ESXi=6.0-600-201510401
VMware ESXi=6.0-600-201511401
VMware ESXi=6.0-600-201601101
VMware ESXi=6.0-600-201601102
VMware ESXi=6.0-600-201601401
VMware ESXi=6.0-600-201601402
VMware ESXi=6.0-600-201601403
VMware ESXi=6.0-600-201601404
VMware ESXi=6.0-600-201601405
VMware ESXi=6.0-600-201602401
VMware ESXi=6.0-600-201603101
VMware ESXi=6.0-600-201603102
VMware ESXi=6.0-600-201603201
VMware ESXi=6.0-600-201603202
VMware ESXi=6.0-600-201603203
VMware ESXi=6.0-600-201603204
VMware ESXi=6.0-600-201603205
VMware ESXi=6.0-600-201603206
VMware ESXi=6.0-600-201603207
VMware ESXi=6.0-600-201603208
VMware ESXi=6.0-600-201605401
VMware ESXi=6.0-600-201608101
VMware ESXi=6.0-600-201608401
VMware ESXi=6.0-600-201608402
VMware ESXi=6.0-600-201608403
VMware ESXi=6.0-600-201608404
VMware ESXi=6.0-600-201608405
VMware ESXi=6.0-600-201610410
VMware ESXi=6.0-600-201611401
VMware ESXi=6.0-600-201611402
VMware ESXi=6.0-600-201611403
VMware ESXi=6.0-600-201702101
VMware ESXi=6.0-600-201702102
VMware ESXi=6.0-600-201702201
VMware ESXi=6.0-600-201702202
VMware ESXi=6.0-600-201702203
VMware ESXi=6.0-600-201702204
VMware ESXi=6.0-600-201702205
VMware ESXi=6.0-600-201702206
VMware ESXi=6.0-600-201702207
VMware ESXi=6.0-600-201702208
VMware ESXi=6.0-600-201702209
VMware ESXi=6.0-600-201702210
VMware ESXi=6.0-600-201702211
VMware ESXi=6.0-600-201702212
VMware ESXi=6.0-600-201703401
VMware ESXi=6.0-600-201706101
VMware ESXi=6.0-600-201706102
VMware ESXi=6.0-600-201706103
VMware ESXi=6.0-600-201706401
VMware ESXi=6.0-600-201706402
VMware ESXi=6.0-600-201706403
VMware ESXi=6.0-600-201710301
VMware ESXi=6.0-600-201811001
VMware ESXi=6.0-600-201811401
VMware ESXi=6.5
VMware ESXi=6.5-650-201701001
VMware ESXi=6.5-650-201703001
VMware ESXi=6.5-650-201703002
VMware ESXi=6.5-650-201704001
VMware ESXi=6.5-650-201707101
VMware ESXi=6.5-650-201707102
VMware ESXi=6.5-650-201707103
VMware ESXi=6.5-650-201707201
VMware ESXi=6.5-650-201707202
VMware ESXi=6.5-650-201707203
VMware ESXi=6.5-650-201707204
VMware ESXi=6.5-650-201707205
VMware ESXi=6.5-650-201707206
VMware ESXi=6.5-650-201707207
VMware ESXi=6.5-650-201707208
VMware ESXi=6.5-650-201707209
VMware ESXi=6.5-650-201707210
VMware ESXi=6.5-650-201707211
VMware ESXi=6.5-650-201707212
VMware ESXi=6.5-650-201707213
VMware ESXi=6.5-650-201707214
VMware ESXi=6.5-650-201707215
VMware ESXi=6.5-650-201707216
VMware ESXi=6.5-650-201707217
VMware ESXi=6.5-650-201707218
VMware ESXi=6.5-650-201707219
VMware ESXi=6.5-650-201707220
VMware ESXi=6.5-650-201707221
VMware ESXi=6.5-650-201710001
VMware ESXi=6.5-650-201712001
VMware ESXi=6.5-650-201803001
VMware ESXi=6.5-650-201806001
VMware ESXi=6.5-650-201808001
VMware ESXi=6.5-650-201810001
VMware ESXi=6.5-650-201810002
VMware ESXi=6.5-650-201811001
VMware ESXi=6.5-650-201811002
VMware ESXi=6.5-650-201811301
VMware ESXi=6.5-650-201901001
VMware ESXi=6.5-650-201903001
VMware ESXi=6.5-650-201905001
VMware ESXi=6.5-650-201908001
VMware ESXi=6.5-650-201910001
VMware ESXi=6.5-650-20191004001
VMware ESXi=6.5-650-201911001
VMware ESXi=6.5-650-201911401
VMware ESXi=6.5-650-201911402
VMware ESXi=6.7
VMware ESXi=6.7-670-201806001
VMware ESXi=6.7-670-201807001
VMware ESXi=6.7-670-201808001
VMware ESXi=6.7-670-201810001
VMware ESXi=6.7-670-201810101
VMware ESXi=6.7-670-201810102
VMware ESXi=6.7-670-201810103
VMware ESXi=6.7-670-201810201
VMware ESXi=6.7-670-201810202
VMware ESXi=6.7-670-201810203
VMware ESXi=6.7-670-201810204
VMware ESXi=6.7-670-201810205
VMware ESXi=6.7-670-201810206
VMware ESXi=6.7-670-201810207
VMware ESXi=6.7-670-201810208
VMware ESXi=6.7-670-201810209
VMware ESXi=6.7-670-201810210
VMware ESXi=6.7-670-201810211
VMware ESXi=6.7-670-201810212
VMware ESXi=6.7-670-201810213
VMware ESXi=6.7-670-201810214
VMware ESXi=6.7-670-201810215
VMware ESXi=6.7-670-201810216
VMware ESXi=6.7-670-201810217
VMware ESXi=6.7-670-201810218
VMware ESXi=6.7-670-201810219
VMware ESXi=6.7-670-201810220
VMware ESXi=6.7-670-201810221
VMware ESXi=6.7-670-201810222
VMware ESXi=6.7-670-201810223
VMware ESXi=6.7-670-201810224
VMware ESXi=6.7-670-201810225
VMware ESXi=6.7-670-201810226
VMware ESXi=6.7-670-201810227
VMware ESXi=6.7-670-201810228
VMware ESXi=6.7-670-201810229
VMware ESXi=6.7-670-201810230
VMware ESXi=6.7-670-201810231
VMware ESXi=6.7-670-201810232
VMware ESXi=6.7-670-201810233
VMware ESXi=6.7-670-201810234
VMware ESXi=6.7-670-201811001
VMware ESXi=6.7-670-201901001
VMware ESXi=6.7-670-201901401
VMware ESXi=6.7-670-201901402
VMware ESXi=6.7-670-201901403
VMware ESXi=6.7-670-201903001
VMware ESXi=6.7-670-201904001
VMware ESXi=6.7-670-201904201
VMware ESXi=6.7-670-201904202
VMware ESXi=6.7-670-201904203
VMware ESXi=6.7-670-201904204
VMware ESXi=6.7-670-201904205
VMware ESXi=6.7-670-201904206
VMware ESXi=6.7-670-201904207
VMware ESXi=6.7-670-201904208
VMware ESXi=6.7-670-201904209
VMware ESXi=6.7-670-201904210
VMware ESXi=6.7-670-201904211
VMware ESXi=6.7-670-201904212
VMware ESXi=6.7-670-201904213
VMware ESXi=6.7-670-201904214
VMware ESXi=6.7-670-201904215
VMware ESXi=6.7-670-201904216
VMware ESXi=6.7-670-201904217
VMware ESXi=6.7-670-201904218
VMware ESXi=6.7-670-201904219
VMware ESXi=6.7-670-201904220
VMware ESXi=6.7-670-201904221
VMware ESXi=6.7-670-201904222
VMware ESXi=6.7-670-201904223
VMware ESXi=6.7-670-201904224
VMware ESXi=6.7-670-201904225
VMware ESXi=6.7-670-201904226
VMware ESXi=6.7-670-201904227
VMware ESXi=6.7-670-201904228
VMware ESXi=6.7-670-201904229
VMware ESXi=6.7-670-201905001
VMware ESXi=6.7-670-201906002
VMware ESXi=6.7-670-201908101
VMware ESXi=6.7-670-201908102
VMware ESXi=6.7-670-201908103
VMware ESXi=6.7-670-201908104
VMware ESXi=6.7-670-201908201
VMware ESXi=6.7-670-201908202
VMware ESXi=6.7-670-201908203
VMware ESXi=6.7-670-201908204
VMware ESXi=6.7-670-201908205
VMware ESXi=6.7-670-201908206
VMware ESXi=6.7-670-201908207
VMware ESXi=6.7-670-201908208
VMware ESXi=6.7-670-201908209
VMware ESXi=6.7-670-201908210
VMware ESXi=6.7-670-201908211
VMware ESXi=6.7-670-201908212
VMware ESXi=6.7-670-201908213
VMware ESXi=6.7-670-201908214
VMware ESXi=6.7-670-201908215
VMware ESXi=6.7-670-201908216
VMware ESXi=6.7-670-201908217
VMware ESXi=6.7-670-201908218
VMware ESXi=6.7-670-201908219
VMware ESXi=6.7-670-201908220
VMware ESXi=6.7-670-201908221
VMware ESXi=6.7-670-201911001
redhat Enterprise Linux Desktop=6.0
redhat Enterprise Linux Desktop=7.0
redhat Enterprise Linux For Ibm Z Systems=6.0_s390x
redhat Enterprise Linux For Ibm Z Systems=7.0_s390x
redhat Enterprise Linux For Ibm Z Systems Eus=7.7_s390x
redhat Enterprise Linux For Power Big Endian=6.0_ppc64
redhat Enterprise Linux For Power Big Endian=7.0_ppc64
redhat Enterprise Linux For Power Big Endian Eus=7.7_ppc64
redhat Enterprise Linux For Power Little Endian=7.0_ppc64le
redhat Enterprise Linux For Power Little Endian Eus=7.7_ppc64le
redhat Enterprise Linux Server=6.0
redhat Enterprise Linux Server=7.0
redhat Enterprise Linux Server Aus=7.7
redhat Enterprise Linux Server Eus=7.7
redhat Enterprise Linux Server Tus=7.7
redhat Enterprise Linux Workstation=6.0
redhat Enterprise Linux Workstation=7.0
OpenSLP OpenSLP<=2.0.0
Fedoraproject Fedora=30
Fedoraproject Fedora=31
OpenSLP OpenSLP=1.2.1
OpenSLP OpenSLP=2.0.0
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
If OpenSLP is not required, disable the OpenSLP/SLP service on affected ESXi and Horizon DaaS appliances to eliminate the network-exposed vulnerable service on port 427.
OpenSLP (SLP service) on VMware ESXi and Horizon DaaS appliances service_enabled = false - Compensating control
Restrict network access to port 427 (SLP) to trusted management networks only using firewall rules, ACLs, or network segmentation. Block or filter traffic to port 427 at the edge and internal firewalls for appliances exposed to untrusted networks.
Event History
Nov 28, 2019
Data Sourced
via Red Hat·10:39 AM
DescriptionSeverityAffected Software
Dec 6, 2019
CVE Published
via MITRE·03:54 PM
Data Sourced
via MITRE·03:54 PM
DescriptionWeakness
Data Sourced
via NVD·04:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Nov 3, 2021
Known Exploited
via CISA·12:00 AM
Known Ransomware
via CISA·12:00 AM
Frequently Asked Questions
1
What is the severity of CVE-2019-5544?
CVE-2019-5544 has been rated as critical due to its potential for remote code execution.
2
How do I fix CVE-2019-5544?
To mitigate CVE-2019-5544, it is recommended to apply the latest patches provided by VMware for affected versions of ESXi and Horizon DaaS.
3
What systems are affected by CVE-2019-5544?
CVE-2019-5544 affects VMware ESXi 6.0 and certain versions of Horizon DaaS that utilize the OpenSLP service.
4
What kind of vulnerability is CVE-2019-5544?
CVE-2019-5544 is a heap-based buffer overflow vulnerability that can allow remote code execution.
5
Is CVE-2019-5544 being actively exploited?
As of the latest updates, there are indications that CVE-2019-5544 may be targeted in attacks, highlighting the urgency for patching.