Path Traversal in Apache Solr
CVE-2021-44548
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.051 (91.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Solr
- Apache Software Foundation Solr — versions unspecified
- Microsoft Windows
Weakness classification (CWE)
References
- security@apache.org (x_refsource_MISC, Vendor Advisory)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-44548?
- CVE-2021-44548 is a critical-severity vulnerability in Apache Solr, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2021-12-23.
- How severe is CVE-2021-44548?
- Critical severity. CVSS v3 base score is 9.8 out of 10.