FreeBSD : curl -- password overflow vulnerability (f4d638b9-e6e5-4dbe-8c70-571dbc116174)

critical Nessus Plugin ID 117305

Language:

New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

curl security problems :

CVE-2018-14618: NTLM password overflow via integer overflow

The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap.

The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes).
This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow.

This bug is almost identical to CVE-2017-8816.

Solution

Update the affected packages.

See Also

https://curl.haxx.se/docs/security.html

https://curl.haxx.se/docs/CVE-2018-14618.html

http://www.nessus.org/u?1185b533

Plugin Details

Severity: Critical

ID: 117305

File Name: freebsd_pkg_f4d638b9e6e54dbe8c70571dbc116174.nasl

Version: 1.4

Type: local

Published: 9/6/2018

Updated: 8/12/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*, p-cpe:2.3:a:freebsd:freebsd:curl:*:*:*:*:*:*:*, p-cpe:2.3:a:freebsd:freebsd:linux-c7-curl:*:*:*:*:*:*:*

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 9/5/2018

Vulnerability Publication Date: 9/5/2018

Reference Information

CVE: CVE-2018-14618