XStream is vulnerable to a Remote Command Execution attack
CVE-2021-39144
Key Information:
Badges
What is CVE-2021-39144?
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
CISA has reported CVE-2021-39144
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-39144 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace
The CISA's recommendation is: Apply updates per vendor instructions.
Affected Version(s)
xstream < 1.4.18
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
EPSS Score
94% chance of being exploited in the next 30 days.
CVSS V3.1
Timeline
- 👾
Exploit known to exist
- 🦅
CISA Reported
- 🟡
Public PoC available
Vulnerability published
Vulnerability Reserved