XStream is vulnerable to a Remote Command Execution attack
CVE-2021-29505

8.8HIGH

Key Information:

Vendor

X-stream

Status
Xstream
Vendor
CVE Published:
28 May 2021

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 91%

What is CVE-2021-29505?

XStream is software for serializing Java objects to XML and back again. A vulnerability in XStream versions prior to 1.4.17 may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types is affected. The vulnerability is patched in version 1.4.17.

Affected Version(s)

xstream < 1.4.17

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.

CVE-2021-29505
Created by MyBlackManba

References

https://github.com/x-stream/xstream/security/advisories/G...
x_refsource_CONFIRM
https://github.com/x-stream/xstream/commit/24fac82191292c...
x_refsource_MISC
https://lists.apache.org/thread.html/r8ee51debf7fd184b6a6...
mailing-listx_refsource_MLIST

EPSS Score

91% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-29505 : XStream is vulnerable to a Remote Command Execution attack