Buffer overflow in Haxx Curl
CVE-2017-1000101
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`.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.039 (89.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- Haxx Curl — versions 7.4.1, 7.35.0, 7.36.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.apple.com/HT208221
- access.redhat.com/errata/RHSA-2018:3558 (vendor-advisory)
- security.gentoo.org/glsa/201709-14 (vendor-advisory, Third Party Advisory, Issue Tracking)
- curl.haxx.se/docs/adv_20170809A.html (Issue Tracking, Vendor Advisory)
- www.securitytracker.com/id/1039117 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/100249 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3992 (vendor-advisory)
Frequently asked questions
- What is CVE-2017-1000101?
- CVE-2017-1000101 is a medium-severity vulnerability in Haxx Curl, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2017-10-05.
- How severe is CVE-2017-1000101?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2017-1000101 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.