cbcvebase.
CVE-2020-3387
published 2020-07-16

CVE-2020-3387: A vulnerability in Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to execute code with root privileges on an affected system. The…

PriorityP267high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
13.02%
95.9th percentile
A vulnerability in Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to execute code with root privileges on an affected system. The vulnerability is due to insufficient input sanitization during user authentication processing. An attacker could exploit this vulnerability by sending a crafted response to the Cisco SD-WAN vManage Software. A successful exploit could allow the attacker to access the software and execute commands they should not be authorized to execute.

Affected

5 ranges
VendorProductVersion rangeFixed in
ciscocisco_sd-wan_vmanage
ciscosd-wan_firmware<= 18.3.0
ciscosd-wan_firmware>= 18.4.0 < 19.2.319.2.3
ciscosd-wan_firmware>= 19.3.0 < 20.1.1.120.1.1.1
ciscosd-wan_vmanage

Detection & IOCsextracted from sources · hover to see the quote

  • Exploit vector involves sending a crafted response to Cisco SD-WAN vManage Software during user authentication processing — monitor for anomalous or malformed authentication responses to vManage
  • Exploitation requires an authenticated session — look for privilege escalation to root following legitimate or suspicious authentication events on vManage
  • Root cause is insufficient input sanitization during user authentication processing — audit vManage authentication logs for unexpected or malformed input patterns
  • ·No workarounds are available for this vulnerability; only software updates remediate it
  • ·Cisco internal bug tracker reference for this vulnerability is CSCvt70892, useful for vendor patch tracking

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C
vendor_cisco7.5HIGH
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