CVE-2023-44487

HIGHCVSS 7.5/10Actively ExploitedEPSS 100.00%

Last modified

CVE-2023-44487 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 100.00% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
100.00%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
SiemensSimatic S7-1500 Cpu 1518f-4 Pn\/Dp Mfp Firmware>= 3.1.5
SiemensSinec Ins< 1.0
SiemensSinec Ins1.0
SiemensSinec Nms< 3.0
SiemensSt7 Scadaconnect< 1.1
SiemensRuggedcom Ape1808 FirmwareAll versions
SiemensSimatic S7-1500 Cpu 1518-4 Pn\/Dp Mfp Firmware>= 3.1.5
SiemensSiplus S7-1500 Cpu 1518-4 Pn\/Dp Mfp Firmware>= 3.1.5
IetfHttp2.0
Nghttp2Nghttp2< 1.57.0
NettyNetty< 4.1.100
EnvoyproxyEnvoy1.24.10
EnvoyproxyEnvoy1.25.9
EnvoyproxyEnvoy1.26.4
EnvoyproxyEnvoy1.27.0
EclipseJetty< 9.4.53
EclipseJetty>= 10.0.0, < 10.0.17
EclipseJetty>= 11.0.0, < 11.0.17
EclipseJetty>= 12.0.0, < 12.0.2
CaddyserverCaddy< 2.7.5
GolangGo< 1.20.10
GolangGo>= 1.21.0, < 1.21.3
GolangHttp2< 0.17.0
GolangNetworking< 0.17.0
F5Big-Ip Access Policy Manager>= 13.1.0, <= 13.1.5
F5Big-Ip Access Policy Manager>= 14.1.0, <= 14.1.5
F5Big-Ip Access Policy Manager>= 15.1.0, <= 15.1.10
F5Big-Ip Access Policy Manager>= 16.1.0, <= 16.1.4
F5Big-Ip Access Policy Manager17.1.0
F5Big-Ip Advanced Firewall Manager>= 13.1.0, <= 13.1.5
F5Big-Ip Advanced Firewall Manager>= 14.1.0, <= 14.1.5
F5Big-Ip Advanced Firewall Manager>= 15.1.0, <= 15.1.10
F5Big-Ip Advanced Firewall Manager>= 16.1.0, <= 16.1.4
F5Big-Ip Advanced Firewall Manager17.1.0
F5Big-Ip Advanced Web Application Firewall>= 13.1.0, <= 13.1.5
F5Big-Ip Advanced Web Application Firewall>= 14.1.0, <= 14.1.5
F5Big-Ip Advanced Web Application Firewall>= 15.1.0, <= 15.1.10
F5Big-Ip Advanced Web Application Firewall>= 16.1.0, <= 16.1.4
F5Big-Ip Advanced Web Application Firewall17.1.0
F5Big-Ip Analytics>= 13.1.0, <= 13.1.5
F5Big-Ip Analytics>= 14.1.0, <= 14.1.5
F5Big-Ip Analytics>= 15.1.0, <= 15.1.10
F5Big-Ip Analytics>= 16.1.0, <= 16.1.4
F5Big-Ip Analytics17.1.0
F5Big-Ip Application Acceleration Manager>= 13.1.0, <= 13.1.5
F5Big-Ip Application Acceleration Manager>= 14.1.0, <= 14.1.5
F5Big-Ip Application Acceleration Manager>= 15.1.0, <= 15.1.10
F5Big-Ip Application Acceleration Manager>= 16.1.0, <= 16.1.4
F5Big-Ip Application Acceleration Manager17.1.0
F5Big-Ip Application Security Manager>= 13.1.0, <= 13.1.5

Showing 50 of 284 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-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.
How severe is CVE-2023-44487?
CVE-2023-44487 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 100.00% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2023-44487?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-44487?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST