Information disclosure in Haxx Libcurl
CVE-2017-1000099
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.027 (85.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
- Haxx Libcurl — versions 7.54.1
Weakness classification (CWE)
References
- www.securityfocus.com/bid/100281 (VDB Entry, Third Party Advisory, vdb-entry)
- security.gentoo.org/glsa/201709-14 (vendor-advisory, Patch, VDB Entry, Third Party Advisory)
- curl.haxx.se/0809C.patch (Patch, Vendor Advisory)
- www.securitytracker.com/id/1039119 (VDB Entry, Third Party Advisory, vdb-entry)
- curl.haxx.se/docs/adv_20170809C.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2017-1000099?
- CVE-2017-1000099 is a medium-severity vulnerability in Haxx Libcurl, classified under Information Disclosure. CVSS score: 6.5/10. Published 2017-10-05.
- How severe is CVE-2017-1000099?
- Medium severity. CVSS v3 base score is 6.5 out of 10.