Detections
Analytics
CVE-2016-8622
critical
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.
References
https://www.tenable.com/security/tns-2016-21
https://security.gentoo.org/glsa/201701-47
https://curl.haxx.se/docs/adv_20161102H.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622
https://access.redhat.com/errata/RHSA-2018:3558
https://access.redhat.com/errata/RHSA-2018:2486
http://www.securitytracker.com/id/1037192
http://www.securityfocus.com/bid/94105
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html