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CVE-2017-1000101

Published: 4 October 2017

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`.

Notes

AuthorNote
sbeattie
only affects curl command line tool, not libcurl
introduced in 7.34.0

Priority

Low

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
curl
Launchpad, Ubuntu, Debian
trusty
Released (7.35.0-1ubuntu2.11)
upstream
Released (7.55.0)
xenial
Released (7.47.0-1ubuntu2.3)
zesty
Released (7.52.1-4ubuntu1.2)
Patches:
upstream: https://curl.haxx.se/CVE-2017-1000101.patch
upstream: https://github.com/curl/curl/commit/453e7a7a03a2cec749abd3878a48e728c515cca7

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N