In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently unresponsive with increasing CPU and memory consumption. An authenticated attacker can systematically exhaust all proxy-server workers, resulting in denial of service. The defect was introduced in Swift 2.36.0.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.35.1, < 2.35.3CPE match | cpe:2.3:a:openstack:swift:*:*:*:*:*:*:*:* | ||
>= 2.36.0, < 2.36.2CPE match | cpe:2.3:a:openstack:swift:*:*:*:*:*:*:*:* | ||
>= 2.37.0, < 2.37.2CPE match | cpe:2.3:a:openstack:swift:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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