Vulnerability Details CVE-2016-8622
The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.017
EPSS Ranking 81.2%
CVSS Severity
CVSS v3 Score 3.7
CVSS v2 Score 7.5
Products affected by CVE-2016-8622
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cpe:2.3:a:haxx:libcurl:6.0
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cpe:2.3:a:haxx:libcurl:6.1
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cpe:2.3:a:haxx:libcurl:6.2
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cpe:2.3:a:haxx:libcurl:6.3
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cpe:2.3:a:haxx:libcurl:6.3.1
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cpe:2.3:a:haxx:libcurl:6.4
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cpe:2.3:a:haxx:libcurl:6.5
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cpe:2.3:a:haxx:libcurl:6.5.1
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cpe:2.3:a:haxx:libcurl:6.5.2
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cpe:2.3:a:haxx:libcurl:7.1
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cpe:2.3:a:haxx:libcurl:7.1.1
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cpe:2.3:a:haxx:libcurl:7.10
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cpe:2.3:a:haxx:libcurl:7.10.1
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cpe:2.3:a:haxx:libcurl:7.10.2
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cpe:2.3:a:haxx:libcurl:7.10.3
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cpe:2.3:a:haxx:libcurl:7.10.4
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cpe:2.3:a:haxx:libcurl:7.10.5
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cpe:2.3:a:haxx:libcurl:7.10.6
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cpe:2.3:a:haxx:libcurl:7.10.7
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cpe:2.3:a:haxx:libcurl:7.10.8
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cpe:2.3:a:haxx:libcurl:7.11.0
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cpe:2.3:a:haxx:libcurl:7.11.1
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cpe:2.3:a:haxx:libcurl:7.11.2
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cpe:2.3:a:haxx:libcurl:7.12.0
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cpe:2.3:a:haxx:libcurl:7.12.1
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cpe:2.3:a:haxx:libcurl:7.12.2
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cpe:2.3:a:haxx:libcurl:7.12.3
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cpe:2.3:a:haxx:libcurl:7.13.0
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cpe:2.3:a:haxx:libcurl:7.13.1
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cpe:2.3:a:haxx:libcurl:7.13.2
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cpe:2.3:a:haxx:libcurl:7.14.0
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cpe:2.3:a:haxx:libcurl:7.14.1
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cpe:2.3:a:haxx:libcurl:7.15.0
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cpe:2.3:a:haxx:libcurl:7.15.1
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cpe:2.3:a:haxx:libcurl:7.15.2
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cpe:2.3:a:haxx:libcurl:7.15.3
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cpe:2.3:a:haxx:libcurl:7.15.4
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cpe:2.3:a:haxx:libcurl:7.15.5
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cpe:2.3:a:haxx:libcurl:7.16.0
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cpe:2.3:a:haxx:libcurl:7.16.1
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cpe:2.3:a:haxx:libcurl:7.16.2
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cpe:2.3:a:haxx:libcurl:7.16.3
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cpe:2.3:a:haxx:libcurl:7.16.4
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cpe:2.3:a:haxx:libcurl:7.17.0
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cpe:2.3:a:haxx:libcurl:7.17.1
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cpe:2.3:a:haxx:libcurl:7.18.0
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cpe:2.3:a:haxx:libcurl:7.18.1
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cpe:2.3:a:haxx:libcurl:7.18.2
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cpe:2.3:a:haxx:libcurl:7.19.0
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cpe:2.3:a:haxx:libcurl:7.19.1
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cpe:2.3:a:haxx:libcurl:7.19.2
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cpe:2.3:a:haxx:libcurl:7.19.3
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cpe:2.3:a:haxx:libcurl:7.19.4
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cpe:2.3:a:haxx:libcurl:7.19.5
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cpe:2.3:a:haxx:libcurl:7.19.6
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cpe:2.3:a:haxx:libcurl:7.19.7
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cpe:2.3:a:haxx:libcurl:7.2
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cpe:2.3:a:haxx:libcurl:7.2.1
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cpe:2.3:a:haxx:libcurl:7.20.0
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cpe:2.3:a:haxx:libcurl:7.20.1
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cpe:2.3:a:haxx:libcurl:7.21.0
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cpe:2.3:a:haxx:libcurl:7.21.1
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cpe:2.3:a:haxx:libcurl:7.21.2
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cpe:2.3:a:haxx:libcurl:7.21.3
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cpe:2.3:a:haxx:libcurl:7.21.4
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cpe:2.3:a:haxx:libcurl:7.21.5
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cpe:2.3:a:haxx:libcurl:7.21.6
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cpe:2.3:a:haxx:libcurl:7.21.7
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cpe:2.3:a:haxx:libcurl:7.22.0
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cpe:2.3:a:haxx:libcurl:7.23.0
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cpe:2.3:a:haxx:libcurl:7.23.1
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cpe:2.3:a:haxx:libcurl:7.24.0
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cpe:2.3:a:haxx:libcurl:7.25.0
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cpe:2.3:a:haxx:libcurl:7.26.0
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cpe:2.3:a:haxx:libcurl:7.27.0
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cpe:2.3:a:haxx:libcurl:7.28.0
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cpe:2.3:a:haxx:libcurl:7.28.1
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cpe:2.3:a:haxx:libcurl:7.29.0
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cpe:2.3:a:haxx:libcurl:7.3
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cpe:2.3:a:haxx:libcurl:7.30.0
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cpe:2.3:a:haxx:libcurl:7.31.0
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cpe:2.3:a:haxx:libcurl:7.32.0
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cpe:2.3:a:haxx:libcurl:7.33.0
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cpe:2.3:a:haxx:libcurl:7.34.0
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cpe:2.3:a:haxx:libcurl:7.35.0
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cpe:2.3:a:haxx:libcurl:7.36.0
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cpe:2.3:a:haxx:libcurl:7.37.0
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cpe:2.3:a:haxx:libcurl:7.37.1
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cpe:2.3:a:haxx:libcurl:7.38.0
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cpe:2.3:a:haxx:libcurl:7.39
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cpe:2.3:a:haxx:libcurl:7.39.0
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cpe:2.3:a:haxx:libcurl:7.4
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cpe:2.3:a:haxx:libcurl:7.4.1
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cpe:2.3:a:haxx:libcurl:7.4.2
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cpe:2.3:a:haxx:libcurl:7.40.0
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cpe:2.3:a:haxx:libcurl:7.41.0
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cpe:2.3:a:haxx:libcurl:7.42
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cpe:2.3:a:haxx:libcurl:7.42.0
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cpe:2.3:a:haxx:libcurl:7.42.1
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cpe:2.3:a:haxx:libcurl:7.43.0
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cpe:2.3:a:haxx:libcurl:7.44.0
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cpe:2.3:a:haxx:libcurl:7.45.0
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cpe:2.3:a:haxx:libcurl:7.46.0
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cpe:2.3:a:haxx:libcurl:7.47.0
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cpe:2.3:a:haxx:libcurl:7.47.1
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cpe:2.3:a:haxx:libcurl:7.48.0
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cpe:2.3:a:haxx:libcurl:7.49.0
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cpe:2.3:a:haxx:libcurl:7.49.1
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cpe:2.3:a:haxx:libcurl:7.5
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cpe:2.3:a:haxx:libcurl:7.5.1
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cpe:2.3:a:haxx:libcurl:7.5.2
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cpe:2.3:a:haxx:libcurl:7.50.0
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cpe:2.3:a:haxx:libcurl:7.50.1
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cpe:2.3:a:haxx:libcurl:7.50.2
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cpe:2.3:a:haxx:libcurl:7.50.3
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cpe:2.3:a:haxx:libcurl:7.6
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cpe:2.3:a:haxx:libcurl:7.6.1
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cpe:2.3:a:haxx:libcurl:7.7
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cpe:2.3:a:haxx:libcurl:7.7.1
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cpe:2.3:a:haxx:libcurl:7.7.2
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cpe:2.3:a:haxx:libcurl:7.7.3
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cpe:2.3:a:haxx:libcurl:7.8
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cpe:2.3:a:haxx:libcurl:7.8.1
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cpe:2.3:a:haxx:libcurl:7.9
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cpe:2.3:a:haxx:libcurl:7.9.1
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cpe:2.3:a:haxx:libcurl:7.9.2
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cpe:2.3:a:haxx:libcurl:7.9.3
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cpe:2.3:a:haxx:libcurl:7.9.4
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cpe:2.3:a:haxx:libcurl:7.9.5
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cpe:2.3:a:haxx:libcurl:7.9.6
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cpe:2.3:a:haxx:libcurl:7.9.7
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cpe:2.3:a:haxx:libcurl:7.9.8