Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-41079 |
CWE-ID | CWE-835 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Amazon Linux AMI Operating systems & Components / Operating system |
Vendor | Amazon Web Services |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU56634
Risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-41079
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe 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.
Update the affected packages:
noarch:Vulnerable software versions
tomcat8-el-3.0-api-8.5.69-1.88.amzn1.noarch
tomcat8-docs-webapp-8.5.69-1.88.amzn1.noarch
tomcat8-jsp-2.3-api-8.5.69-1.88.amzn1.noarch
tomcat8-javadoc-8.5.69-1.88.amzn1.noarch
tomcat8-lib-8.5.69-1.88.amzn1.noarch
tomcat8-servlet-3.1-api-8.5.69-1.88.amzn1.noarch
tomcat8-8.5.69-1.88.amzn1.noarch
tomcat8-admin-webapps-8.5.69-1.88.amzn1.noarch
tomcat8-log4j-8.5.69-1.88.amzn1.noarch
tomcat8-webapps-8.5.69-1.88.amzn1.noarch
src:
tomcat8-8.5.69-1.88.amzn1.src
Amazon Linux AMI: All versions
External linkshttp://alas.aws.amazon.com/ALAS-2021-1547.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.