Buffer overflow in Xmill and EcoStruxure Control Expert - CVE-2021-21827
Published: August 12, 2021
Vulnerability identifier: #VU55802
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-21827
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: AT&T Labs
Schneider Electric
Schneider Electric
Affected software:
Xmill
EcoStruxure Control Expert
Xmill
EcoStruxure Control Expert
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the XML Decompression DecodeTreeBlock functionality within "TREETOKEN_ATTRIBWHITESPACE". A remote attacker can send a specially crafted XMI File, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-21827
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.