CVE-2017-1000101 Memory corruption in n/a
A buffer over-read in curl's URL globbing feature allows attackers to cause crashes or disclose memory contents via crafted URLs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2017-1000101?
CVE-2017-1000101 is a medium-severity memory corruption vulnerability in Haxx Curl, published on 4 Oct 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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`.
Weakness: CWE-119
Which versions are affected by CVE-2017-1000101?
It affects 1 product.
Products include Haxx Curl.
How do I fix CVE-2017-1000101?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2017-1000101 being exploited?
There is no known exploitation of CVE-2017-1000101 in the wild and no public exploit code.
Other vulnerabilities in Haxx Curl
Sources
Also known as ALPINE-CVE-2017-1000101, CLEANSTART-2026-WP63137, CURL-CVE-2017-1000101, DEBIAN-CVE-2017-1000101, GHSA-qxxx-25g2-qj92, UBUNTU-CVE-2017-1000101.