Vulnerability Name:

CVE-2018-11796 (CCN-151083)

Assigned:2018-10-09
Published:2018-10-09
Updated:2019-09-03
Summary:In Apache Tika 1.19 (CVE-2018-11761), we added an entity expansion limit for XML parsing. However, Tika reuses SAXParsers and calls reset() after each parse, which, for Xerces2 parsers, as per the documentation, removes the user-specified SecurityManager and thus removes entity expansion limits after the first parse. Apache Tika versions from 0.1 to 1.19 are therefore still vulnerable to entity expansions which can lead to a denial of service attack. Users should upgrade to 1.19.1 or later.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-611
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-11796

Source: BID
Type: Third Party Advisory, VDB Entry
105585

Source: CCN
Type: BID-105585
Apache Tika CVE-2018-11796 Incomplete Fix XML External Entity Denial of Service Vulnerability

Source: REDHAT
Type: UNKNOWN
RHSA-2019:3892

Source: XF
Type: UNKNOWN
apache-tika-cve201811796-dos(151083)

Source: CONFIRM
Type: Mailing List, Vendor Advisory
https://lists.apache.org/thread.html/88de8350cda9b184888ec294c813c5bd8a2081de8fd3666f8904bc05@%3Cdev.tika.apache.org%3E

Source: CCN
Type: oss-sec Mailing List, Tue, 9 Oct 2018 16:05:18 -0400
[CVE-2018-11796] Apache Tika Denial of Service via XML Entity Expansion Vulnerability

Source: CONFIRM
Type: UNKNOWN
https://security.netapp.com/advisory/ntap-20190903-0002/

Source: CCN
Type: Apache Web site
Apache Tika - a content analysis toolkit

Source: CCN
Type: IBM Security Bulletin 888135 (QRadar SIEM)
IBM QRadar Incident Forensics is vulnerable to publicly disclosed vulnerabilities from Apache Tika (CVE-2018-11761, CVE-2018-11762, CVE-2018-8017, CVE-2018-11796)

Source: CCN
Type: IBM Security Bulletin 6444033 (Log Analysis)
Multiple vulnerabilities in Apache Tika affects Apache Solr shipped with IBM Operations Analytics - Log Analysis

Source: CCN
Type: IBM Security Bulletin 6524700 (Planning Analytics Workspace)
IBM Planning Analytics Workspace is affected by security vulnerabilities

Vulnerable Configuration:Configuration 1:
  • cpe:/a:apache:tika:*:*:*:*:*:*:*:* (Version >= 0.1 and <= 1.19)

    • Configuration CCN 1:
  • cpe:/a:apache:tika:1.19:*:*:*:*:*:*:*
  • AND
  • cpe:/a:ibm:qradar_security_information_and_event_manager:7.2:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:qradar_security_information_and_event_manager:7.3:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:log_analysis:1.3.1:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:log_analysis:1.3.2:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:log_analysis:1.3.3:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:log_analysis:1.3.4:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:log_analysis:1.3.5:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:log_analysis:1.3.6:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:planning_analytics_workspace:2.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:201811796000
    V
    		CVE-2018-11796 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-10-09
    oval:com.ubuntu.bionic:def:2018117960000000
    V
    		CVE-2018-11796 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-10-09
    oval:com.ubuntu.cosmic:def:201811796000
    V
    		CVE-2018-11796 on Ubuntu 18.10 (cosmic) - medium.
    2018-10-09
    oval:com.ubuntu.xenial:def:2018117960000000
    V
    		CVE-2018-11796 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-10-09
    oval:com.ubuntu.xenial:def:201811796000
    V
    		CVE-2018-11796 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-10-09
    oval:com.ubuntu.disco:def:2018117960000000
    V
    		CVE-2018-11796 on Ubuntu 19.04 (disco) - medium.
    2018-10-09
    oval:com.ubuntu.cosmic:def:2018117960000000
    V
    		CVE-2018-11796 on Ubuntu 18.10 (cosmic) - medium.
    2018-10-09
    BACK
    apache tika *
    apache tika 1.19
    ibm qradar security information and event manager 7.2
    ibm qradar security information and event manager 7.3
    ibm log analysis 1.3.1
    ibm log analysis 1.3.2
    ibm log analysis 1.3.3
    ibm log analysis 1.3.4
    ibm log analysis 1.3.5
    ibm log analysis 1.3.6
    ibm planning analytics workspace 2.0