SUSE update for tomcat



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-30640
CVE-2021-33037
CVE-2021-41079
CWE-ID CWE-287
CWE-444
CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 SUSE Linux Enterprise Module for Web Scripting
Operating systems & Components / Operating system

tomcat-webapps
Operating systems & Components / Operating system package or component

tomcat-servlet-4_0-api
Operating systems & Components / Operating system package or component

tomcat-lib
Operating systems & Components / Operating system package or component

tomcat-jsp-2_3-api
Operating systems & Components / Operating system package or component

tomcat-el-3_0-api
Operating systems & Components / Operating system package or component

tomcat-admin-webapps
Operating systems & Components / Operating system package or component

tomcat
Operating systems & Components / Operating system package or component

Vendor SUSE

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Improper Authentication

EUVDB-ID: #VU55417

Risk: Medium

CVSSv4.0: 4.8 [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]

CVE-ID: CVE-2021-30640

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

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.

Mitigation

Update the affected package tomcat to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Web Scripting: 15-SP2 - 15-SP3

tomcat-webapps: before 9.0.36-13.1

tomcat-servlet-4_0-api: before 9.0.36-13.1

tomcat-lib: before 9.0.36-13.1

tomcat-jsp-2_3-api: before 9.0.36-13.1

tomcat-el-3_0-api: before 9.0.36-13.1

tomcat-admin-webapps: before 9.0.36-13.1

tomcat: before 9.0.36-13.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213672-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU55423

Risk: Medium

CVSSv4.0: 2.7 [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]

CVE-ID: CVE-2021-33037

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

Exploit availability: No

Description

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.

Mitigation

Update the affected package tomcat to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Web Scripting: 15-SP2 - 15-SP3

tomcat-webapps: before 9.0.36-13.1

tomcat-servlet-4_0-api: before 9.0.36-13.1

tomcat-lib: before 9.0.36-13.1

tomcat-jsp-2_3-api: before 9.0.36-13.1

tomcat-el-3_0-api: before 9.0.36-13.1

tomcat-admin-webapps: before 9.0.36-13.1

tomcat: before 9.0.36-13.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213672-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Infinite loop

EUVDB-ID: #VU56634

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-41079

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop when processing certain TLS packets. A remote attacker can send a specially crafted packet to the application, consume all available system resources and cause denial of service conditions.

Successful exploitation of vulnerability requires that Apache Tomcat is configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS.

Mitigation

Update the affected package tomcat to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Web Scripting: 15-SP2 - 15-SP3

tomcat-webapps: before 9.0.36-13.1

tomcat-servlet-4_0-api: before 9.0.36-13.1

tomcat-lib: before 9.0.36-13.1

tomcat-jsp-2_3-api: before 9.0.36-13.1

tomcat-el-3_0-api: before 9.0.36-13.1

tomcat-admin-webapps: before 9.0.36-13.1

tomcat: before 9.0.36-13.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213672-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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