#VU52569 Deserialization of Untrusted Data in xstream - CVE-2021-21342

Vulnerability identifier: #VU52569

Vulnerability risk: High

CVSSv4.0: 8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-21342

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
xstream
Universal components / Libraries / Libraries used by multiple products

Vendor: XStream

Description

The vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insecure input validation when processing serialized data. A remote attacker can pass specially crafted data to the application and perform SSRF attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

xstream: 0.2 - 1.4.15

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External links
https://x-stream.github.io/changes.html#1.4.16
https://github.com/x-stream/xstream/security/advisories/GHSA-hvv8-336g-rx3m
https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E
https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html
https://x-stream.github.io/CVE-2021-21342.html
https://x-stream.github.io/security.html#workaround

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.