Entity Expansion Vulnerability in Apache Tika XML Parsers
CVE-2018-11761

7.5HIGH

Key Information:

Vendor
Apache
Status
Apache Tika
Vendor
CVE Published:
19 September 2018

Badges

👾 Exploit Exists🟡 Public PoC

Summary

In Apache Tika versions ranging from 0.1 to 1.18, the XML parsers lacked proper configuration to limit entity expansion. This oversight leaves the system susceptible to entity expansion attacks, which can be exploited to cause a denial of service. Attackers can leverage this vulnerability to create excessive resource consumption, ultimately impacting the availability and performance of applications utilizing Apache Tika for document processing.

Affected Version(s)

Apache Tika 0.1 to 1.18

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-11761
Created by brianwrf

References

http://www.securityfocus.com/bid/105514
vdb-entryx_refsource_BID
https://lists.apache.org/thread.html/5553e10bba5604117967...
mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/708d94141126eac03011...
mailing-listx_refsource_MLIST

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.