CVE-2017-1000101

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`.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
• v3.0•MEDIUM•Score: 6.5CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
• v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.66%• Percentile: 71%

Techniques & Countermeasures

• CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

  The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Affected Systems

• haxx•curl

  7.4.1 | 7.35.0 | 7.36.0 | 7.37.0 | 7.37.1 | 7.38.0 | 7.39.0 | 7.40.0 | 7.41.0 | 7.42.0 | 7.42.1 | 7.43.0 | 7.44.0 | 7.45.0 | 7.46.0 | 7.47.0 | 7.47.1 | 7.48.0 | 7.49.0 | 7.49.1 | 7.50.0 | 7.50.1 | 7.50.2 | 7.50.3 | 7.51.0 | 7.52.0 | 7.52.1 | 7.53.0 | 7.53.1 | 7.54.0 | 7.54.1 | 7.55.0

References (7)

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