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FreeBSD: VID-9314058E-5204-11E7-B712-B1A44A034D72 (CVE-2017-9502): cURL -- URL file scheme drive letter buffer overflow

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FreeBSD: VID-9314058E-5204-11E7-B712-B1A44A034D72 (CVE-2017-9502): cURL -- URL file scheme drive letter buffer overflow

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
06/14/2017
Created
07/25/2018
Added
06/16/2017
Modified
05/07/2019

Description

In curl before 7.54.1 on Windows and DOS, libcurl's default protocol function, which is the logic that allows an application to set which protocol libcurl should attempt to use when given a URL without a scheme part, had a flaw that could lead to it overwriting a heap based memory buffer with seven bytes. If the default protocol is specified to be FILE or a file: URL lacks two slashes, the given "URL" starts with a drive letter, and libcurl is built for Windows or DOS, then libcurl would copy the path 7 bytes off, so that the end of the given path would write beyond the malloc buffer (7 bytes being the length in bytes of the ascii string "file://").

Solution(s)

  • freebsd-upgrade-package-curl

References

  • CVE-2017-9502

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