CVE-2023-44487
HIGH severity · CVSS 7.5 · Uncontrolled resource consumption · actively exploited (CISA KEV)
7.5CVSS HIGH ● exploited
🔴 Actively exploited in the wild (CISA Known Exploited Vulnerabilities).
Added to KEV 2023-10-10. US federal agencies must patch by 2023-10-31.
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)94%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (11)
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://www.openwall.com/lists/oss-security/2023/10/10/6Advisory
- http://www.openwall.com/lists/oss-security/2023/10/10/7Advisory
- http://www.openwall.com/lists/oss-security/2023/10/13/4Advisory
- http://www.openwall.com/lists/oss-security/2023/10/13/9Advisory
- http://www.openwall.com/lists/oss-security/2023/10/18/4Advisory
- http://www.openwall.com/lists/oss-security/2023/10/18/8Advisory
- http://www.openwall.com/lists/oss-security/2023/10/19/6Advisory
- http://www.openwall.com/lists/oss-security/2023/10/20/8Advisory