Privoxy < 3.0.23 Multiple DoS Vulnerabilities

medium Nessus Plugin ID 81516

Synopsis

The remote web proxy is affected by multiple denial of service vulnerabilities.

Description

According to its self-reported version number, the version of Privoxy running on the remote host is prior to 3.0.23. It is, therefore, potentially affected by multiple denial of service vulnerabilities :

- A flaw exists in the chunked_body_is_complete() function in 'jcc.c' due to improper processing of invalid chunk-encoded bodies. A remote attacker, using a specially crafted client request, can cause the Privoxy instance to abort. (CVE-2015-1380)

- Multiple flaws exist in the pcrs_compile_replacement() function in 'pcrs.c' when handling backreferences.
Remote attackers can exploit these flaws to cause a segmentation fault or memory consumption.
(CVE-2015-1381)

- An invalid read flaw in 'parsers.c' allows a remote attacker, via an HTTP request with a specially-crafted time header, to cause a denial of service condition.
(CVE-2015-1382)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Privoxy version 3.0.23 or later.

See Also

https://sourceforge.net/p/ijbswa/mailman/message/33089172/

http://www.nessus.org/u?02038803

http://www.nessus.org/u?e70b2d80

http://www.nessus.org/u?fc0894c2

Plugin Details

Severity: Medium

ID: 81516

File Name: privoxy_3_0_23.nasl

Version: 1.4

Type: remote

Family: Firewalls

Published: 2/25/2015

Updated: 11/15/2018

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: cpe:/a:privoxy:privoxy

Required KB Items: Settings/ParanoidReport, www/Privoxy

Exploit Ease: No known exploits are available

Patch Publication Date: 1/26/2015

Vulnerability Publication Date: 1/26/2015

Reference Information

CVE: CVE-2015-1380, CVE-2015-1381, CVE-2015-1382

BID: 72354, 72355, 72360