Amazon Linux AMI update for tomcat8



Risk High
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2018-8034
CVE-2018-8037
CVE-2018-1336
CVE-2018-8014
CWE-ID CWE-264
CWE-200
CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU13992

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8034

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to host name verification when using TLS with the WebSocket client was missing. A remote unauthenticated attacker can bypass security restrictions when using TLS.

Mitigation

Update the affected packages.

noarch:
    tomcat8-log4j-8.5.32-1.78.amzn1.noarch
    tomcat8-lib-8.5.32-1.78.amzn1.noarch
    tomcat8-8.5.32-1.78.amzn1.noarch
    tomcat8-el-3.0-api-8.5.32-1.78.amzn1.noarch
    tomcat8-admin-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.32-1.78.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.32-1.78.amzn1.noarch
    tomcat8-docs-webapp-8.5.32-1.78.amzn1.noarch
    tomcat8-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-javadoc-8.5.32-1.78.amzn1.noarch

src:
    tomcat8-8.5.32-1.78.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2018-1056.html


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) Information disclosure

EUVDB-ID: #VU13993

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8037

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The vulnerability exists due to improper handling of connection closures by the non-blocking I/O (NIO) and NIO2 connectors. A remote unauthenticated attacker can send a specially crafted request that submits malicious input, trigger bug in the tracking of connection closures, reuse user sessions in a new connection and access arbitrary data.

Mitigation

Update the affected packages.

noarch:
    tomcat8-log4j-8.5.32-1.78.amzn1.noarch
    tomcat8-lib-8.5.32-1.78.amzn1.noarch
    tomcat8-8.5.32-1.78.amzn1.noarch
    tomcat8-el-3.0-api-8.5.32-1.78.amzn1.noarch
    tomcat8-admin-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.32-1.78.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.32-1.78.amzn1.noarch
    tomcat8-docs-webapp-8.5.32-1.78.amzn1.noarch
    tomcat8-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-javadoc-8.5.32-1.78.amzn1.noarch

src:
    tomcat8-8.5.32-1.78.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2018-1056.html


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: #VU13986

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-1336

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to improper handing of overflow in the UTF-8 decoder with supplementary characters. A remote attacker can send trigger an infinite loop in the decoder and cause the service to crash.

Mitigation

Update the affected packages.

noarch:
    tomcat8-log4j-8.5.32-1.78.amzn1.noarch
    tomcat8-lib-8.5.32-1.78.amzn1.noarch
    tomcat8-8.5.32-1.78.amzn1.noarch
    tomcat8-el-3.0-api-8.5.32-1.78.amzn1.noarch
    tomcat8-admin-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.32-1.78.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.32-1.78.amzn1.noarch
    tomcat8-docs-webapp-8.5.32-1.78.amzn1.noarch
    tomcat8-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-javadoc-8.5.32-1.78.amzn1.noarch

src:
    tomcat8-8.5.32-1.78.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2018-1056.html


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.

4) Information disclosure

EUVDB-ID: #VU12798

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8014

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The weakness exists due to the defaults settings for the CORS filter are insecure and enable supportsCredentials for all origins. It is expected that users of the CORS filter will have configured it appropriately for their environment rather than using it in the default configuration. A remote attacker can access important data.

Mitigation

Update the affected packages.

noarch:
    tomcat8-log4j-8.5.32-1.78.amzn1.noarch
    tomcat8-lib-8.5.32-1.78.amzn1.noarch
    tomcat8-8.5.32-1.78.amzn1.noarch
    tomcat8-el-3.0-api-8.5.32-1.78.amzn1.noarch
    tomcat8-admin-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.32-1.78.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.32-1.78.amzn1.noarch
    tomcat8-docs-webapp-8.5.32-1.78.amzn1.noarch
    tomcat8-webapps-8.5.32-1.78.amzn1.noarch
    tomcat8-javadoc-8.5.32-1.78.amzn1.noarch

src:
    tomcat8-8.5.32-1.78.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2018-1056.html


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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