Description

curl supports "globbing" of URLs, in which a user can pass a numerical range to have the tool iterate over those numbers to do a sequence of transfers. In the globbing function that parses the numerical range, there was an omission that made curl read a byte beyond the end of the URL if given a carefully crafted, or just wrongly written, URL. The URL is stored in a heap based buffer, so it could then be made to wrongly read something else instead of crashing. An example of a URL that triggers the flaw would be `http://ur%20[0-60000000000000000000`.

References

http://www.debian.org/security/2017/dsa-3992

http://www.securityfocus.com/bid/100249

http://www.securitytracker.com/id/1039117

https://access.redhat.com/errata/RHSA-2018:3558

https://curl.haxx.se/docs/adv_20170809A.html

https://security.gentoo.org/glsa/201709-14

https://support.apple.com/HT208221

Details

Risk Information

CVSS v2

CVSS v3