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AUSCERT External Security Bulletin Redistribution
ESB-2020.1674
Security Bulletin: [All] Apache Tomcat (core only) (Publicly disclosed
vulnerability) CVE-2020-1935, CVE-2019-17569
13 May 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM UrbanCode Release
Publisher: IBM
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Network Appliance
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-1935 CVE-2019-17569
Reference: ESB-2020.1608
ESB-2020.1565
ESB-2020.0841
ESB-2020.0667
Original Bulletin:
https://www.ibm.com/support/pages/node/6208740
Comment: This advisory references vulnerabilities in products which run on
platforms other than IBM. It is recommended that administrators
running IBM UrbanCode Release check for an updated version of the
software for their operating system.
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[All] Apache Tomcat (core only) (Publicly disclosed vulnerability)
CVE-2020-1935, CVE-2019-17569
Security Bulletin
Summary
In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the
HTTP header parsing code used an approach to end-of-line parsing that allowed
some invalid HTTP headers to be parsed as valid. This led to a possibility of
HTTP Request Smuggling if Tomcat was located behind a reverse proxy that
incorrectly handled the invalid Transfer-Encoding header in a particular
manner. Such a reverse proxy is considered unlikely.
Vulnerability Details
CVEID: CVE-2020-1935
DESCRIPTION: Apache Tomcat is vulnerable to HTTP request smuggling, caused by a
flaw when handling unusual Transfer-Encoding HTTP header. By sending a
specially-crafted request, an attacker could exploit this vulnerability to
poison the web cache, bypass web application firewall protection, and conduct
XSS attacks.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
176788 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
CVEID: CVE-2019-17569
DESCRIPTION: Apache Tomcat is vulnerable to HTTP request smuggling, caused by a
flaw when handling unusual Transfer-Encoding HTTP header. By sending a
specially-crafted request, an attacker could exploit this vulnerability to
poison the web cache, bypass web application firewall protection, and conduct
XSS attacks.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
176784 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
Affected Products and Versions
+---------------------------+----------+
|Affected Product(s) |Version(s)|
+---------------------------+----------+
|UCR - IBM UrbanCode Release|All |
+---------------------------+----------+
Remediation/Fixes
Update to 6.2.3.1 or later
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
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