#VU50000 Security restrictions bypass in Hadoop - CVE-2020-9492

Vulnerability identifier: #VU50000

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-9492

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Hadoop
Server applications / Frameworks for developing and running applications

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the way Apache Hadoop handles SPNEGO authorization headers. A remote WebHDFS client can trigger services to send server credentials to a webhdfs path for capturing the service principal.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Hadoop: 2.0.0 - 3.2.1

---

External links
https://seclists.org/oss-sec/2021/q1/69

---

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.