golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

Fedora 37 : golang (2023-4bf641255e)

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-4bf641255e advisory. This update includes a security fix to the net/http package. Tenable has extracted the preceding description block directly from the Fedora security...

RHEL 8 : varnish:6 (RHSA-2023:6022)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2023:6022 advisory. Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and ov...

HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

AlmaLinux 9 : toolbox (ALSA-2023:6077)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2023:6077 advisory. - A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total...

BIT-2023-44487

The HTTP/2 protocol allows a denial of service server resource consumption because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023...

HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

Amazon Linux 2023 : runc (ALAS2023-2023-396)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2023-396 advisory. The HTTP/2 protocol allows a denial of service server resource consumption because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023...

Rocky Linux 9 : go-toolset and golang (RLSA-2023:5738)

The remote Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2023:5738 advisory. - Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time verifying signatures. With fix, the size of RS...

Oracle Linux 9 : varnish (ELSA-2023-5924)

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2023-5924 advisory. - Add parameters h2rstallowance and h2rstallowanceperiod to mitigate CVE-2023-44487 Tenable has extracted the preceding description block directly from the Orac...

golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

AZL-44955 CVE-2023-43622 affecting package mod_http2 for versions less than 2.0.29-3

An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in...

CVE-2023-43622 Apache HTTP Server: DoS in HTTP/2 with initial windows size 0

An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in...

AlmaLinux 9 : tomcat (ALSA-2023:5929)

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2023:5929 advisory. - The HTTP/2 protocol allows a denial of service server resource consumption because request cancellation can reset many streams quickly, as exploited in the wild ...

golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...

Amazon Linux 2 : runc (ALASNITRO-ENCLAVES-2023-032)

The version of runc installed on the remote host is prior to 1.1.7-4. It is, therefore, affected by a vulnerability as referenced in the ALAS2NITRO-ENCLAVES-2023-032 advisory. The HTTP/2 protocol allows a denial of service server resource consumption because request cancellation can reset many...

HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RSTSTREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any...