Undertow Red Hat Undertow Java HTTP Server and Servlet Container

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By the Year

In 2022 there have been 2 vulnerabilities in Red Hat Undertow with an average score of 6.7 out of ten. Last year Undertow had 2 security vulnerabilities published. If vulnerabilities keep coming in at the current rate, it appears that number of security vulnerabilities in Undertow in 2022 could surpass last years number. However, the average CVE base score of the vulnerabilities in 2022 is greater by 0.55.

Year Vulnerabilities Average Score
2022 2 6.70
2021 2 6.15
2020 6 7.37
2019 3 9.03
2018 3 5.97

It may take a day or so for new Undertow vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.

Recent Red Hat Undertow Security Vulnerabilities

A flaw was found in Undertow

CVE-2021-3629 7.5 - High - May 24, 2022

A flaw was found in Undertow. A potential security issue in flow control handling by the browser over http/2 may potentially cause overhead or a denial of service in the server. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.40.Final and prior to 2.2.11.Final.

Resource Exhaustion

A flaw was found in undertow

CVE-2021-3597 5.9 - Medium - May 24, 2022

A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.

Race Condition

A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4

CVE-2019-19343 7.5 - High - March 23, 2021

A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4. A memory leak in HttpOpenListener due to holding remote connections indefinitely may lead to denial of service. Versions before undertow 2.0.25.SP1 and jboss-remoting 5.0.14.SP1 are believed to be vulnerable.

Improper Resource Shutdown or Release

A flaw was found in Undertow

CVE-2021-20220 4.8 - Medium - February 23, 2021

A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own. The highest threat from this vulnerability is to data confidentiality and integrity.

HTTP Request Smuggling

A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final

CVE-2020-10687 4.8 - Medium - September 23, 2020

A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.

HTTP Request Smuggling

A flaw was discovered in Undertow in versions before Undertow 2.1.1.Final where certain requests to the "Expect: 100-continue" header may cause an out of memory error

CVE-2020-10705 7.5 - High - June 10, 2020

A flaw was discovered in Undertow in versions before Undertow 2.1.1.Final where certain requests to the "Expect: 100-continue" header may cause an out of memory error. This flaw may potentially lead to a denial of service.

Allocation of Resources Without Limits or Throttling

A flaw was found in Undertow in versions before 2.1.1.Final, regarding the processing of invalid HTTP requests with large chunk sizes

CVE-2020-10719 6.5 - Medium - May 26, 2020

A flaw was found in Undertow in versions before 2.1.1.Final, regarding the processing of invalid HTTP requests with large chunk sizes. This flaw allows an attacker to take advantage of HTTP request smuggling.

HTTP Request Smuggling

A file inclusion vulnerability was found in the AJP connector enabled with a default AJP configuration port of 8009 in Undertow version 2.0.29.Final and before and was fixed in 2.0.30.Final

CVE-2020-1745 9.8 - Critical - April 28, 2020

A file inclusion vulnerability was found in the AJP connector enabled with a default AJP configuration port of 8009 in Undertow version 2.0.29.Final and before and was fixed in 2.0.30.Final. A remote, unauthenticated attacker could exploit this vulnerability to read web application files from a vulnerable server. In instances where the vulnerable server allows file uploads, an attacker could upload malicious JavaServer Pages (JSP) code within a variety of file types and trigger this vulnerability to gain remote code execution.

A flaw was found in all undertow-2.x.x SP1 versions prior to undertow-2.0.30.SP1, all undertow-1.x.x and undertow-2.x.x versions prior to undertow-2.1.0.Final, where the Servlet container causes servletPath to normalize incorrectly by truncating the path after semicolon

CVE-2020-1757 8.1 - High - April 21, 2020

A flaw was found in all undertow-2.x.x SP1 versions prior to undertow-2.0.30.SP1, all undertow-1.x.x and undertow-2.x.x versions prior to undertow-2.1.0.Final, where the Servlet container causes servletPath to normalize incorrectly by truncating the path after semicolon which may lead to an application mapping resulting in the security bypass.

Improper Input Validation

A vulnerability was found in the Undertow HTTP server in versions before 2.0.28.SP1 when listening on HTTPS

CVE-2019-14888 7.5 - High - January 23, 2020

A vulnerability was found in the Undertow HTTP server in versions before 2.0.28.SP1 when listening on HTTPS. An attacker can target the HTTPS port to carry out a Denial Of Service (DOS) to make the service unavailable on SSL.

A flaw was found in, all under 2.0.20, in the Undertow DEBUG log for io.undertow.request.security

CVE-2019-10212 9.8 - Critical - October 02, 2019

A flaw was found in, all under 2.0.20, in the Undertow DEBUG log for io.undertow.request.security. If enabled, an attacker could abuse this flaw to obtain the user's credentials from the log files.

Insertion of Sensitive Information into Log File

undertow before version 2.0.23.Final is vulnerable to an information leak issue

CVE-2019-10184 7.5 - High - July 25, 2019

undertow before version 2.0.23.Final is vulnerable to an information leak issue. Web apps may have their directory structures predicted through requests without trailing slashes via the api.

AuthZ

A vulnerability was found in Undertow web server before 2.0.21

CVE-2019-3888 9.8 - Critical - June 12, 2019

A vulnerability was found in Undertow web server before 2.0.21. An information exposure of plain text credentials through log files because Connectors.executeRootHandler:402 logs the HttpServerExchange object at ERROR level using UndertowLogger.REQUEST_LOGGER.undertowRequestFailed(t, exchange)

Insertion of Sensitive Information into Log File

An information leak vulnerability was found in Undertow

CVE-2018-14642 5.3 - Medium - September 18, 2018

An information leak vulnerability was found in Undertow. If all headers are not written out in the first write() call then the code that handles flushing the buffer will always write out the full contents of the writevBuffer buffer, which may contain data from previous requests.

Information Disclosure

It was found that URLResource.getLastModified() in Undertow closes the file descriptors only when they are finalized

CVE-2018-1114 6.5 - Medium - September 11, 2018

It was found that URLResource.getLastModified() in Undertow closes the file descriptors only when they are finalized which can cause file descriptors to exhaust. This leads to a file handler leak.

Resource Exhaustion

In Undertow before versions 7.1.2.CR1, 7.1.2.GA it was found

CVE-2018-1067 6.1 - Medium - May 21, 2018

In Undertow before versions 7.1.2.CR1, 7.1.2.GA it was found that the fix for CVE-2016-4993 was incomplete and Undertow web server is vulnerable to the injection of arbitrary HTTP headers, and also response splitting, due to insufficient sanitization and validation of user input before the input is used as part of an HTTP header value.

HTTP Response Splitting

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