CVE-2017-1000099 Information disclosure in n/a
An attacker can read uninitialized heap memory via file:// URL requests in libcurl, potentially exposing sensitive private data.
- 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-2017-1000099?
CVE-2017-1000099 is a medium-severity vulnerability in Haxx Libcurl, 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
When asking to get a file from a file:// URL, libcurl provides a feature that outputs meta-data about the file using HTTP-like headers. The code doing this would send the wrong buffer to the user (stdout or the application's provide callback), which could lead to other private data from the heap to get inadvertently displayed. The wrong buffer was an uninitialized memory area allocated on the heap and if it turned out to not contain any zero byte, it would continue and display the data following that buffer in memory.
Weakness: CWE-200
Which versions are affected by CVE-2017-1000099?
It affects 1 product.
Products include Haxx Libcurl.
How do I fix CVE-2017-1000099?
Upgrade to a fixed version.
Is CVE-2017-1000099 being exploited?
There is no known exploitation of CVE-2017-1000099 in the wild and no public exploit code.
Other vulnerabilities in Haxx Libcurl
Sources
Also known as ALPINE-CVE-2017-1000099, CLEANSTART-2026-DV20769, CURL-CVE-2017-1000099, GHSA-q937-ph5c-26qf.