CVE Vulnerability

CVE-2018-16840

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.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f Patch Third Party Advisory
https://curl.haxx.se/docs/CVE-2018-16840.html Patch Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840 Issue Tracking Third Party Advisory
https://usn.ubuntu.com/3805-1/ Third Party Advisory
http://www.securitytracker.com/id/1042013 Third Party Advisory VDB Entry
https://security.gentoo.org/glsa/201903-03 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
Information

Published : 2018-10-31 06:29

Updated : 2019-10-09 11:36

NVD link : CVE-2018-16840

Mitre link : CVE-2018-16840

Products Affected
No products.
CWE
CWE-416