CVE-2017-1000101

What it is

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`.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure.

Exploit odds

3.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-10-05 01:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:58 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.7% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-10-05 01:29 UTC

Last modified

2026-06-17 00:58 UTC

Exploit probability

3.7% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Haxx Curl 7.4.1
• Haxx Curl 7.35.0
• Haxx Curl 7.36.0
• Haxx Curl 7.37.0
• Haxx Curl 7.37.1
• Haxx Curl 7.38.0
• Haxx Curl 7.39.0
• Haxx Curl 7.40.0

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2017-1000101.md and follow it. Check whether this project is affected by CVE-2017-1000101. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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