⚠ Actively exploited
Added to CISA KEV on 2023-10-10. Federal agencies required to patch by 2023-10-31. Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable..
CVE-2023-44487
Severity
7.5HIGH
EPSS
94.4%
top 0.03%
CISA KEV
KEV
Added 2023-10-10
Due 2023-10-31
Exploit
Exploited in wild
Active exploitation observed
Affected products
Timeline
PublishedOct 10
KEV addedOct 10
KEV dueOct 31
Latest updateNov 26
CISA Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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:HExploitability: 3.9 | Impact: 3.6
Affected Packages139 packages
Also affects: Debian Linux 10.0, 11.0, 12.0, Fedora 37, 38, Enterprise Linux 6.0, 8.0, 9.0, Openshift Container Platform 4.0