FreeBSD : curl -- multiple vulnerabilities (dd343a2b-7ee7-11e9-a290-8ddc52868fa9)

high Nessus Plugin ID 125441

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

curl security problems :

CVE-2019-5435: Integer overflows in curl_url_set()

libcurl contains two integer overflows in the curl_url_set() function that if triggered, can lead to a too small buffer allocation and a subsequent heap buffer overflow.

The flaws only exist on 32 bit architectures and require excessive string input lengths.

CVE-2019-5436: TFTP receive buffer overflow

libcurl contains a heap buffer overflow in the function (tftp_receive_packet()) that recevives data from a TFTP server. It calls recvfrom() with the default size for the buffer rather than with the size that was used to allocate it. Thus, the content that might overwrite the heap memory is entirely controlled by the server.

The flaw exists if the user selects to use a 'blksize' of 504 or smaller (default is 512). The smaller size that is used, the larger the possible overflow becomes.

Users chosing a smaller size than default should be rare as the primary use case for changing the size is to make it larger.

It is rare for users to use TFTP across the Internet. It is most commonly used within local networks.

Solution

Update the affected package.

See Also

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

https://curl.haxx.se/docs/CVE-2019-5435.html

https://curl.haxx.se/docs/CVE-2019-5436.html

http://www.nessus.org/u?0ef4adc4

Plugin Details

Severity: High

ID: 125441

File Name: freebsd_pkg_dd343a2b7ee711e9a2908ddc52868fa9.nasl

Version: 1.3

Type: local

Published: 5/28/2019

Updated: 1/15/2020

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:curl, cpe:/o:freebsd:freebsd

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/25/2019

Vulnerability Publication Date: 5/22/2019

Reference Information

CVE: CVE-2019-5435, CVE-2019-5436