nodejs: HTTP2 'unknownProtocol' cause DoS by resource exhaustion

A flaw was found in nodejs. When too many connection attempts with an 'unknownProtocol' are established a leak of file descriptors can occur leading to a potential denial of service. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and...

nodejs: HTTP2 'unknownProtocol' cause DoS by resource exhaustion

A flaw was found in nodejs. When too many connection attempts with an 'unknownProtocol' are established a leak of file descriptors can occur leading to a potential denial of service. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and...

tomcat: Apache Tomcat HTTP/2 Request mix-up

A flaw was found in Apache Tomcat. If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection in violation of the HTTP/2 protocol, it is possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - fro...

tomcat: HTTP/2 request header mix-up

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this...

tomcat: specially crafted sequence of HTTP/2 requests can lead to DoS

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become...

dotnet: ASP.NET Core Callbacks outside of locks cause Krestel deadlock when using HTTP2

A flaw was found in dotnet. Running callbacks outside of locks results in Krestel deadlock using HTTP2. The highest threat from this vulnerability is to system availability...

dotnet: ASP.NET Core Callbacks outside of locks cause Krestel deadlock when using HTTP2

A flaw was found in dotnet. Running callbacks outside of locks results in Krestel deadlock using HTTP2. The highest threat from this vulnerability is to system availability...

dotnet: ASP.NET Core Callbacks outside of locks cause Krestel deadlock when using HTTP2

A flaw was found in dotnet. Running callbacks outside of locks results in Krestel deadlock using HTTP2. The highest threat from this vulnerability is to system availability...

SUSE-SU-2021:0041-1 Security update for tomcat

This update for tomcat fixes the following issue: - CVE-2020-17527: Fixed a HTTP/2 request header mix-up bsc1179602...

AZL-6909 CVE-2020-17527 affecting package tomcat 9.0.39-5

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this...

DEBIAN-CVE-2020-17527

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this...

USN-4596-1 tomcat9 vulnerabilities

It was discovered that Tomcat did not properly manage HTTP/2 streams. An attacker could possibly use this to cause Tomcat to consume resources, resulting in a denial of service. CVE-2020-11996 It was discovered that Tomcat did not properly release the HTTP/1.1 processor after the upgrade to HTTP/...

The vulnerability of the nghttp2 library, related to errors occurring when using allocated memory during the processing of HTTP/2 SETTINGS, allows a attacker to cause a service failure.

The vulnerability of the nghttp2 library is related to errors that occur when using allocated memory during the processing of HTTP/2 SETTINGS packets. Exploiting this vulnerability can allow a malicious actor to cause service interruptions by sending numerous HTTP/2 SETTINGS packets...

Apache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for the HTTP/2 module and on certain traffic edge patterns logging statements were made on the wrong connection causing concurrent use of memory pools. Configuring the LogLevel of mod_http2 above "info" will mitigate this vulnerability for unpatched servers.

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USN-4458-1 apache2 vulnerabilities

Fabrice Perez discovered that the Apache modrewrite module incorrectly handled certain redirects. A remote attacker could possibly use this issue to perform redirects to an unexpected URL. CVE-2020-1927 Chamal De Silva discovered that the Apache modproxyftp module incorrectly handled memory when...

DEBIAN-CVE-2020-11993

Apache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for the HTTP/2 module and on certain traffic edge patterns, logging statements were made on the wrong connection, causing concurrent use of memory pools. Configuring the LogLevel of modhttp2 above "info" will mitigate this...

UBUNTU-CVE-2020-9490

Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability f...

HTTP/2: flood using SETTINGS frames results in unbounded memory growth

A flaw was found in HTTP/2. Using SETTINGS frames and queuing of SETTINGS ACK frames, a flood could occur resulting in unbounded memory growth. The highest threat from this vulnerability is to system availability...

HTTP/2: large amount of data requests leads to denial of service

A flaw was found in HTTP/2. An attacker can request a large amount of data by manipulating window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this queue can consume excess CPU, memory, or both, leading to a...

OPENSUSE-SU-2020:1063-1 Security update for tomcat

This update for tomcat fixes the following issues: Tomcat was updated to 9.0.36 See changelog at - CVE-2020-11996: Fixed an issue which by sending a specially crafted sequence of HTTP/2 requests could have triggered high CPU usage for several seconds making potentially the server unresponsive...