Vulnerability identifier: #VU47626

Vulnerability risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-13957

CWE-ID: CWE-693

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Apache Solr
Client/Desktop applications / Other client software

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures, configured in a ConfigSet that's uploaded via API without authentication/authorization. The checks in place to prevent such features can be circumvented by using a combination of UPLOAD/CREATE actions. A remote non-authenticated attacker can upload a specially crafted configuration and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Solr: 8.6.0 - 8.6.2, 8.5.0 - 8.5.2, 8.4.0 - 8.4.1, 8.3.0 - 8.3.1, 8.2.0, 8.1.0 - 8.1.1, 8.0.0, 7.7.0 - 7.7.3, 7.6.0, 7.5.0, 7.4.0, 7.2 - 7.2.1, 7.1 - 7.1.0, 7.3.0 - 7.3.1, 7.0.0 - 7.0.1, 6.6 - 6.6.6

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External links
http://mail-archives.us.apache.org/mod_mbox/www-announce/202010.mbox/%3CCAECwjAWCVLoVaZy%3DTNRQ6Wk9KWVxdPRiGS8NT%2BPHMJCxbbsEVg%40mail.gmail.com%3E

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.