What’s Vulnerable › Vulnerabilities

CVE-2017-1000101

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-10-05 · updated 2026-06-17
• Weakness: CWE-119

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`.

Affected products

• curl: 7.4.1, 7.35.0, 7.36.0, 7.37.0, 7.37.1, 7.38.0 (+26)

References

• http://www.debian.org/security/2017/dsa-3992
• http://www.securityfocus.com/bid/100249
• http://www.securitytracker.com/id/1039117
• https://access.redhat.com/errata/RHSA-2018:3558
• https://curl.haxx.se/docs/adv_20170809A.html
• https://security.gentoo.org/glsa/201709-14
• https://support.apple.com/HT208221
• http://www.debian.org/security/2017/dsa-3992
• http://www.securityfocus.com/bid/100249
• http://www.securitytracker.com/id/1039117
• https://access.redhat.com/errata/RHSA-2018:3558
• https://curl.haxx.se/docs/adv_20170809A.html

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