CVE-2021-44548

Description

An Improper Input Validation vulnerability in DataImportHandler of Apache Solr allows an attacker to provide a Windows UNC path resulting in an SMB network call being made from the Solr host to another host on the network. If the attacker has wider access to the network, this may lead to SMB attacks, which may result in: * The exfiltration of sensitive data such as OS user hashes (NTLM/LM hashes), * In case of misconfigured systems, SMB Relay Attacks which can lead to user impersonation on SMB Shares or, in a worse-case scenario, Remote Code Execution This issue affects all Apache Solr versions prior to 8.11.1. This issue only affects Windows.

How to fix CVE-2021-44548

To remediate CVE-2021-44548, upgrade the affected package to a fixed version below.

• —upgrade to 8.11.1 or later
• —upgrade to 8.11.1 or later

Is CVE-2021-44548 being exploited?

Moderate — EPSS is 5.1%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (2)

• from 0, < 8.11.1
• from 0, < 8.11.1

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-44548
• PATCHgithub.com/apache/solr
• WEBsecurity.netapp.com/advisory/ntap-20220114-0005
• WEBsecurity.netapp.com/advisory/ntap-20220114-0005/