SB2021081231 - Debian update for tomcat9

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Main Vulnerability Database SB2021081231

SB2021081231 - Debian update for tomcat9

Published: August 12, 2021

Security Bulletin ID SB2021081231
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Improper Authentication (CVE-ID: CVE-2021-30640)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in the JNDI Realm when processing authentication requests. A remote attacker can authenticate using variations of a valid user name and bypass some of the protection provided by the LockOut Realm.


2) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2021-33037)

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests, related to processing of transfer encoding headers.  A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.


Remediation

Install update from vendor's website.

References