FreeBSD : cURL -- out of bounds read (ccace707-a8d8-11e7-ac58-b499baebfeaf)

high Nessus Plugin ID 103666

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Synopsis

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

Description

The cURL project reports :

FTP PWD response parser out of bounds read

libcurl may read outside of a heap allocated buffer when doing FTP.

When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the PWD command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses.

Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path.

A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault.

Solution

Update the affected package.

See Also

https://curl.haxx.se/docs/CVE-2017-1000254.html

http://www.nessus.org/u?967ca801

Plugin Details

Severity: High

ID: 103666

File Name: freebsd_pkg_ccace707a8d811e7ac58b499baebfeaf.nasl

Version: 3.6

Type: local

Published: 10/5/2017

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS v3

Risk Factor: High

Base Score: 7.5

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

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

Patch Publication Date: 10/4/2017

Vulnerability Publication Date: 10/4/2017

Reference Information

CVE: CVE-2017-1000254