CVEvulnerability
CVE-2018-16840
9.8 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2018-10-31
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.0 ([email protected])
- 4.3 MEDIUM — CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-416
Description
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
Affected configurations
• haxx curl (>= 7.59.0 < 7.62.0)
• canonical ubuntu linux 14.04
• canonical ubuntu linux 16.04
• canonical ubuntu linux 18.04
• canonical ubuntu linux 18.10
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- http://www.securitytracker.com/id/1042013 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840 Issue Tracking, Third Party Advisory
- https://curl.haxx.se/docs/CVE-2018-16840.html Patch, Vendor Advisory
- https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201903-03 Third Party Advisory
- https://usn.ubuntu.com/3805-1/ Third Party Advisory
- http://www.securitytracker.com/id/1042013 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840 Issue Tracking, Third Party Advisory
- https://curl.haxx.se/docs/CVE-2018-16840.html Patch, Vendor Advisory
- https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201903-03 Third Party Advisory
- https://usn.ubuntu.com/3805-1/ Third Party Advisory