#VU25419 XML External Entity injection in Spacewalk - CVE-2020-1693

Vulnerability identifier: #VU25419

Vulnerability risk: High

CVSSv4.0: 6.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-1693

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Spacewalk
Client/Desktop applications / Other client software

Vendor: Red Hat Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied XML input in the "/rpc/api" endpoint. A remote attacker can pass a specially crafted XML code to the affected application, retrieve the content of certain files and trigger a denial of service, or in certain circumstances, execute arbitrary code on the Spacewalk server.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Spacewalk: 0.5 - 2.9

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1693
https://github.com/spacewalkproject/spacewalk/commit/74e28ec61d916c42061ef4347121650a1c962b0c

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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.