Vulnerability Details CVE-2021-32714
hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This allows possible data loss, or if combined with an upstream HTTP proxy that allows chunk sizes larger than hyper does, can result in "request smuggling" or "desync attacks." The vulnerability is patched in version 0.14.10. Two possible workarounds exist. One may reject requests manually that contain a `Transfer-Encoding` header or ensure any upstream proxy rejects `Transfer-Encoding` chunk sizes greater than what fits in 64-bit unsigned integers.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 59.6%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 6.4
Products affected by CVE-2021-32714
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cpe:2.3:a:hyper:hyper:0.1.0
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cpe:2.3:a:hyper:hyper:0.1.1
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cpe:2.3:a:hyper:hyper:0.1.10
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cpe:2.3:a:hyper:hyper:0.1.11
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cpe:2.3:a:hyper:hyper:0.1.12
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cpe:2.3:a:hyper:hyper:0.1.13
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cpe:2.3:a:hyper:hyper:0.1.2
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cpe:2.3:a:hyper:hyper:0.1.3
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cpe:2.3:a:hyper:hyper:0.1.4
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cpe:2.3:a:hyper:hyper:0.1.5
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cpe:2.3:a:hyper:hyper:0.1.6
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cpe:2.3:a:hyper:hyper:0.1.7
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cpe:2.3:a:hyper:hyper:0.1.8
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cpe:2.3:a:hyper:hyper:0.1.9
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cpe:2.3:a:hyper:hyper:0.10.0
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cpe:2.3:a:hyper:hyper:0.10.1
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cpe:2.3:a:hyper:hyper:0.10.10
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cpe:2.3:a:hyper:hyper:0.10.11
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cpe:2.3:a:hyper:hyper:0.10.12
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cpe:2.3:a:hyper:hyper:0.10.13
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cpe:2.3:a:hyper:hyper:0.10.14
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cpe:2.3:a:hyper:hyper:0.10.15
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cpe:2.3:a:hyper:hyper:0.10.16
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cpe:2.3:a:hyper:hyper:0.10.2
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cpe:2.3:a:hyper:hyper:0.10.3
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cpe:2.3:a:hyper:hyper:0.10.4
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cpe:2.3:a:hyper:hyper:0.10.5
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cpe:2.3:a:hyper:hyper:0.10.6
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cpe:2.3:a:hyper:hyper:0.10.7
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cpe:2.3:a:hyper:hyper:0.10.8
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cpe:2.3:a:hyper:hyper:0.10.9
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cpe:2.3:a:hyper:hyper:0.11.0
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cpe:2.3:a:hyper:hyper:0.11.1
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cpe:2.3:a:hyper:hyper:0.11.10
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cpe:2.3:a:hyper:hyper:0.11.11
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cpe:2.3:a:hyper:hyper:0.11.12
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cpe:2.3:a:hyper:hyper:0.11.13
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cpe:2.3:a:hyper:hyper:0.11.14
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cpe:2.3:a:hyper:hyper:0.11.15
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cpe:2.3:a:hyper:hyper:0.11.16
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cpe:2.3:a:hyper:hyper:0.11.17
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cpe:2.3:a:hyper:hyper:0.11.18
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cpe:2.3:a:hyper:hyper:0.11.19
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cpe:2.3:a:hyper:hyper:0.11.2
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cpe:2.3:a:hyper:hyper:0.11.20
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cpe:2.3:a:hyper:hyper:0.11.21
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cpe:2.3:a:hyper:hyper:0.11.22
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cpe:2.3:a:hyper:hyper:0.11.23
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cpe:2.3:a:hyper:hyper:0.11.24
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cpe:2.3:a:hyper:hyper:0.11.25
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cpe:2.3:a:hyper:hyper:0.11.26
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cpe:2.3:a:hyper:hyper:0.11.27
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cpe:2.3:a:hyper:hyper:0.11.3
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cpe:2.3:a:hyper:hyper:0.11.4
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cpe:2.3:a:hyper:hyper:0.11.5
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cpe:2.3:a:hyper:hyper:0.11.6
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cpe:2.3:a:hyper:hyper:0.11.7
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cpe:2.3:a:hyper:hyper:0.11.8
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cpe:2.3:a:hyper:hyper:0.11.9
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cpe:2.3:a:hyper:hyper:0.12.0
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cpe:2.3:a:hyper:hyper:0.12.1
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cpe:2.3:a:hyper:hyper:0.12.10
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cpe:2.3:a:hyper:hyper:0.12.11
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cpe:2.3:a:hyper:hyper:0.12.12
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cpe:2.3:a:hyper:hyper:0.12.13
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cpe:2.3:a:hyper:hyper:0.12.14
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cpe:2.3:a:hyper:hyper:0.12.15
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cpe:2.3:a:hyper:hyper:0.12.16
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cpe:2.3:a:hyper:hyper:0.12.17
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cpe:2.3:a:hyper:hyper:0.12.18
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cpe:2.3:a:hyper:hyper:0.12.19
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cpe:2.3:a:hyper:hyper:0.12.2
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cpe:2.3:a:hyper:hyper:0.12.20
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cpe:2.3:a:hyper:hyper:0.12.21
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cpe:2.3:a:hyper:hyper:0.12.22
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cpe:2.3:a:hyper:hyper:0.12.23
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cpe:2.3:a:hyper:hyper:0.12.24
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cpe:2.3:a:hyper:hyper:0.12.25
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cpe:2.3:a:hyper:hyper:0.12.26
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cpe:2.3:a:hyper:hyper:0.12.27
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cpe:2.3:a:hyper:hyper:0.12.28
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cpe:2.3:a:hyper:hyper:0.12.29
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cpe:2.3:a:hyper:hyper:0.12.3
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cpe:2.3:a:hyper:hyper:0.12.30
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cpe:2.3:a:hyper:hyper:0.12.31
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cpe:2.3:a:hyper:hyper:0.12.32
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cpe:2.3:a:hyper:hyper:0.12.33
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cpe:2.3:a:hyper:hyper:0.12.34
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cpe:2.3:a:hyper:hyper:0.12.35
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cpe:2.3:a:hyper:hyper:0.12.36
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cpe:2.3:a:hyper:hyper:0.12.4
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cpe:2.3:a:hyper:hyper:0.12.5
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cpe:2.3:a:hyper:hyper:0.12.6
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cpe:2.3:a:hyper:hyper:0.12.7
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cpe:2.3:a:hyper:hyper:0.12.8
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cpe:2.3:a:hyper:hyper:0.12.9
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cpe:2.3:a:hyper:hyper:0.13.0
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cpe:2.3:a:hyper:hyper:0.13.1
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cpe:2.3:a:hyper:hyper:0.13.10
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cpe:2.3:a:hyper:hyper:0.13.2
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cpe:2.3:a:hyper:hyper:0.13.3
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cpe:2.3:a:hyper:hyper:0.13.4
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cpe:2.3:a:hyper:hyper:0.13.5
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cpe:2.3:a:hyper:hyper:0.13.6
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cpe:2.3:a:hyper:hyper:0.13.7
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cpe:2.3:a:hyper:hyper:0.13.8
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cpe:2.3:a:hyper:hyper:0.13.9
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cpe:2.3:a:hyper:hyper:0.14.0
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cpe:2.3:a:hyper:hyper:0.14.1
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cpe:2.3:a:hyper:hyper:0.14.2
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cpe:2.3:a:hyper:hyper:0.14.3
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cpe:2.3:a:hyper:hyper:0.14.4
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cpe:2.3:a:hyper:hyper:0.14.5
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cpe:2.3:a:hyper:hyper:0.14.6
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cpe:2.3:a:hyper:hyper:0.14.7
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cpe:2.3:a:hyper:hyper:0.14.8
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cpe:2.3:a:hyper:hyper:0.14.9
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cpe:2.3:a:hyper:hyper:0.2.0
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cpe:2.3:a:hyper:hyper:0.2.1
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cpe:2.3:a:hyper:hyper:0.3.0
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cpe:2.3:a:hyper:hyper:0.3.1
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cpe:2.3:a:hyper:hyper:0.3.10
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cpe:2.3:a:hyper:hyper:0.3.11
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cpe:2.3:a:hyper:hyper:0.3.12
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cpe:2.3:a:hyper:hyper:0.3.13
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cpe:2.3:a:hyper:hyper:0.3.14
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cpe:2.3:a:hyper:hyper:0.3.15
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cpe:2.3:a:hyper:hyper:0.3.16
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cpe:2.3:a:hyper:hyper:0.3.2
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cpe:2.3:a:hyper:hyper:0.3.3
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cpe:2.3:a:hyper:hyper:0.3.4
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cpe:2.3:a:hyper:hyper:0.3.5
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cpe:2.3:a:hyper:hyper:0.3.6
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cpe:2.3:a:hyper:hyper:0.3.7
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cpe:2.3:a:hyper:hyper:0.3.8
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cpe:2.3:a:hyper:hyper:0.3.9
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cpe:2.3:a:hyper:hyper:0.4.0
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cpe:2.3:a:hyper:hyper:0.5.0
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cpe:2.3:a:hyper:hyper:0.5.1
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cpe:2.3:a:hyper:hyper:0.5.2
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cpe:2.3:a:hyper:hyper:0.6.0
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cpe:2.3:a:hyper:hyper:0.6.1
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cpe:2.3:a:hyper:hyper:0.6.10
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cpe:2.3:a:hyper:hyper:0.6.11
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cpe:2.3:a:hyper:hyper:0.6.12
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cpe:2.3:a:hyper:hyper:0.6.13
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cpe:2.3:a:hyper:hyper:0.6.14
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cpe:2.3:a:hyper:hyper:0.6.15
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cpe:2.3:a:hyper:hyper:0.6.16
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cpe:2.3:a:hyper:hyper:0.6.2
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cpe:2.3:a:hyper:hyper:0.6.3
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cpe:2.3:a:hyper:hyper:0.6.4
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cpe:2.3:a:hyper:hyper:0.6.5
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cpe:2.3:a:hyper:hyper:0.6.7
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cpe:2.3:a:hyper:hyper:0.6.8
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cpe:2.3:a:hyper:hyper:0.6.9
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cpe:2.3:a:hyper:hyper:0.7.0
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cpe:2.3:a:hyper:hyper:0.7.1
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cpe:2.3:a:hyper:hyper:0.7.2
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cpe:2.3:a:hyper:hyper:0.8.0
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cpe:2.3:a:hyper:hyper:0.8.1
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cpe:2.3:a:hyper:hyper:0.9.0
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cpe:2.3:a:hyper:hyper:0.9.1
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cpe:2.3:a:hyper:hyper:0.9.10
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cpe:2.3:a:hyper:hyper:0.9.11
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cpe:2.3:a:hyper:hyper:0.9.12
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cpe:2.3:a:hyper:hyper:0.9.13
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cpe:2.3:a:hyper:hyper:0.9.14
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cpe:2.3:a:hyper:hyper:0.9.15
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cpe:2.3:a:hyper:hyper:0.9.16
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cpe:2.3:a:hyper:hyper:0.9.17
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cpe:2.3:a:hyper:hyper:0.9.18
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cpe:2.3:a:hyper:hyper:0.9.2
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cpe:2.3:a:hyper:hyper:0.9.3
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cpe:2.3:a:hyper:hyper:0.9.4
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cpe:2.3:a:hyper:hyper:0.9.5
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cpe:2.3:a:hyper:hyper:0.9.6
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cpe:2.3:a:hyper:hyper:0.9.7
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cpe:2.3:a:hyper:hyper:0.9.8
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cpe:2.3:a:hyper:hyper:0.9.9