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CVE-2016-8622

Public on 2016-11-10
Modified on 2016-11-10
Description

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.

Severity
Low
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CVSS v3 Base Score
3.7
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 curl 2016-11-10 18:00 ALAS-2016-766

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 2.6 AV:N/AC:H/Au:N/C:N/I:P/A:N
Amazon Linux CVSSv3 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD CVSSv2 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
NVD CVSSv3 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H