Patchfirst
CVE-2020-13957 Public exploit EPSS 79.3%

Apache Solr versions 6.6.0 to 6.6.6, 7.0.0 to 7.7.3 and 8.0.0 to 8.6.2 prevents some features considered dangerous…

Summary

Apache Solr versions 6.6.0 to 6.6.6, 7.0.0 to 7.7.3 and 8.0.0 to 8.6.2 contain a flaw in the protection that blocks dangerous features from being configured in a ConfigSet uploaded through the API. An attacker who can reach the Solr API without authentication or authorization can use a combination of UPLOAD and CREATE actions to circumvent those checks and enable such features.

Official description · CVE.org

Apache Solr versions 6.6.0 to 6.6.6, 7.0.0 to 7.7.3 and 8.0.0 to 8.6.2 prevents some features considered dangerous (which could be used for remote code execution) to be 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.

Breakdown
24.9 / 100
Exploited
Not confirmed
Reports
0
Tactics
0/15

Public exploit code (PoC-in-GitHub) appeared 7 months after disclosure. No confirmed exploitation is recorded.

  1. Disclosedday 0
  2. Public exploit codePoC-in-GitHub+7 mo

6 fixes in solr-parent over 21 months. The latest fix listed for solr-parent is 8.11.1.

Fixes in solr-parentMaven package, by fixed version. Earlier and later fixes in the same package, not necessarily the same bug.

  1. 7.7.0CVE-2018-118021 Apr 2020
  2. 8.6.0CVE-2020-1394117 Aug 2020
  3. 8.6.3CVE-2020-1395713 Oct 2020
  4. 8.8.2CVE-2021-2790513 Apr 2021
  5. 8.8.2CVE-2021-2994313 Apr 2021
  6. 8.11.1CVE-2021-4454823 Dec 2021Latest listed

techniques

No techniques linked

No ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.

Am I affected? What do I upgrade to?

From GitHub Security Advisories and OSV

3 packages in 1 ecosystem. No single main package: each of these ships the affected code.

  • Mavenorg.apache.solr:solr-parent
    Affected: 6.6.0 up to 8.6.3Upgrade to 8.8.2 or later
  • Mavenorg.apache.solr:solr-solrj
    Affected: 6.6.0 up to 8.6.3Upgrade to 8.6.3 or later
  • Mavenorg.apache.solr:solr-core
    Affected: 6.6.0 up to 8.6.3Upgrade to 8.11.3 or later

Check your lockfile against all CVEs

What security researchers reported

Not named in any threat report yet

References

22 links, grouped by NVD tag

mailing-list 20

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