High severity · published Oct 10, 2023
CVE-2023-44487
HTTP/2 Rapid Reset Attack Vulnerability
In wildKEV
7.5
CVSS
100%
EPSS
Yes
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)100.0% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Oct 10, 2023
Federal remediation dueOct 31, 2023
Ransomware campaign useNot known
Affected products
Which versions
TO
Tomcat · Apache
8.5.0 through 8.5.93; 9.0.0 through 9.0.80; 10.1.0 through 10.1.13; 11.0.0; 11.0.0; 11.0.0; +8 more · source: NVD
NE
.net · Microsoft
6.0.0 before 6.0.23; 7.0.0 before 7.0.12 · source: NVD
AP
Apisix · Apache
before 3.6.1 · source: NVD
AC
Asp.net Core · Microsoft
6.0.0 before 6.0.23; 7.0.0 before 7.0.12 · source: NVD
AK
Azure Kubernetes Service · Microsoft
before 2023-10-08 · source: NVD
BA
Big-ip Access Policy Manager · F5
13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.10; 16.1.0 through 16.1.4; 17.1.0 · source: NVD
BA
Big-ip Advanced Firewall Manager · F5
13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.10; 16.1.0 through 16.1.4; 17.1.0 · source: NVD
BA
Big-ip Advanced Web Application Firewall · F5
13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.10; 16.1.0 through 16.1.4; 17.1.0 · source: NVD
BA
Big-ip Analytics · F5
13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.10; 16.1.0 through 16.1.4; 17.1.0 · source: NVD
BA
Big-ip Application Acceleration Manager · F5
13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.10; 16.1.0 through 16.1.4; 17.1.0 · source: NVD
BA
Big-ip Application Security Manager · F5
13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.10; 16.1.0 through 16.1.4; 17.1.0 · source: NVD
BA
Big-ip Application Visibility And Reporting · F5
13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.10; 16.1.0 through 16.1.4; 17.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-44487
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-44487
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
github.com
https://github.com/dotnet/core/blob/e4613450ea0da7fd2fc6b61dfb2c1c1dec1ce9ec/release-notes/6.0/6.0.23/6.0.23.md?plain=1#L73
blog.cloudflare.com
https://blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/
aws.amazon.com
https://aws.amazon.com/security/security-bulletins/AWS-2023-011/
cloud.google.com
https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attack
www.nginx.com
https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/
cloud.google.com
https://cloud.google.com/blog/products/identity-security/google-cloud-mitigated-largest-ddos-attack-peaking-above-398-million-rps/
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