HOMEVULNERABILITIESCVE-2019-12401
HIGH

CVE-2019-12401

CWE-776Published: September 10, 2019· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Solr versions 1.3.0 to 1.4.1, 3.1.0 to 3.6.2 and 4.0.0 to 4.10.4 are vulnerable to an XML resource consumption attack (a.k.a. Lol Bomb) via it’s update handler.?By leveraging XML DOCTYPE and ENTITY type elements, the attacker can create a pattern that will expand when the server parses the XML causing OOMs.

NVD Source

Technical Analysis

CVE-2019-12401 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Apache1 product(s)
solr
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://mail-archives.us.apache.org/mod_mbox/www-announce/201909.mbox/%3CCAECwjAXU4%3DkAo5DeUJw7Kvk67sgCmajAN7LGZQNjbjZ8gv%3DBdw%40mail.gmail.com%3E
ADVISORYhttp://www.openwall.com/lists/oss-security/2019/09/10/1
ADVISORYhttps://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-12401-XML%20Bomb-Apache%20Solr
ADVISORYhttps://security.netapp.com/advisory/ntap-20190926-0002/
ADVISORYhttp://mail-archives.us.apache.org/mod_mbox/www-announce/201909.mbox/%3CCAECwjAXU4%3DkAo5DeUJw7Kvk67sgCmajAN7LGZQNjbjZ8gv%3DBdw%40mail.gmail.com%3E
ADVISORYhttp://www.openwall.com/lists/oss-security/2019/09/10/1
ADVISORYhttps://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-12401-XML%20Bomb-Apache%20Solr
ADVISORYhttps://security.netapp.com/advisory/ntap-20190926-0002/

All References (22)

→
http://mail-archives.us.apache.org/mod_mbox/www-announce/201909.mbox/%3CCAECwjAXU4%3DkAo5DeUJw7Kvk67sgCmajAN7LGZQNjbjZ8gv%3DBdw%40mail.gmail.com%3EBroken Link · Mailing List · Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2019/09/10/1Mailing List · Third Party Advisory
→
https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-12401-XML%20Bomb-Apache%20SolrExploit · Third Party Advisory
→
https://lists.apache.org/thread.html/048ae6e4f84a88e8856f766320b48ad91f9fca2c6f621aa2c40088fe%40%3Cdev.lucene.apache.org%3E
→
https://lists.apache.org/thread.html/0ec231c5ed8d242890e21806d25fdd47f80cc47cac278d2fc1c9c579%40%3Cdev.lucene.apache.org%3E
→
https://lists.apache.org/thread.html/1c92300643f48f13bc59b15e3f886ba62bae1798c7d4c2e5c1ece09b%40%3Cannounce.apache.org%3E
→
https://lists.apache.org/thread.html/521d10a19bfb590f86dff41820ccfb11e92281f233a12c882650931e%40%3Cdev.lucene.apache.org%3E
→
https://lists.apache.org/thread.html/60a924662ead9aeea74e8ea128d9ca935f8de925aa71b15ab2787d6a%40%3Csolr-user.lucene.apache.org%3E
→
https://lists.apache.org/thread.html/7ab5e95a1a0b4f35ffe53f1eb0cb74b4348b49d41b72ac155b843fa2%40%3Cgeneral.lucene.apache.org%3E
→
https://lists.apache.org/thread.html/db8eaca456d03c00a66cbe37548978318d424b9997e3fd7f5c65dffe%40%3Cdev.lucene.apache.org%3E
→
https://security.netapp.com/advisory/ntap-20190926-0002/Third Party Advisory
→
http://mail-archives.us.apache.org/mod_mbox/www-announce/201909.mbox/%3CCAECwjAXU4%3DkAo5DeUJw7Kvk67sgCmajAN7LGZQNjbjZ8gv%3DBdw%40mail.gmail.com%3EBroken Link · Mailing List · Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2019/09/10/1Mailing List · Third Party Advisory
→
https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-12401-XML%20Bomb-Apache%20SolrExploit · Third Party Advisory
→
https://lists.apache.org/thread.html/048ae6e4f84a88e8856f766320b48ad91f9fca2c6f621aa2c40088fe%40%3Cdev.lucene.apache.org%3E

Quick Facts

CVE IDCVE-2019-12401
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-776
CISA KEVNo
Affected1 vendor(s)
PublishedSep 10, 2019

Related CVEs (CWE-776)

CVE-2019-19144
9.8
CVE-2013-4335
9.8
CVE-2014-2228
9.8
CVE-2020-24590
9.1
CVE-2021-23926
9.1
CVE-2024-28982
8.2

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-12401 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2019-12401·NVD