Detections
Analytics
Squid 2.x / 3.x < 3.5.17 / 4.x < 4.0.9 cachemgr.cgi RCE
high Nessus Plugin ID 91194
Language:
Synopsis
The remote proxy server is affected by a remote code execution vulnerability.Description
According to its banner, the version of Squid running on the remote host is 2.x or 3.x prior to 3.5.17, or 4.x prior to 4.0.9. It is, therefore, affected by a buffer overflow condition in the cachemgr.cgi tool due to improper validation of user-supplied input when processing the length of content lines in reports by the cachemgr.cgi tool. An unauthenticated, remote attacker can exploit this issue, via specially crafted data in manager reports, to cause a denial of service condition or the execution of arbitrary code.Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number. Furthermore, the patch released to address this issue does not update the version given in the banner. If the patch has been applied properly, and the service has been restarted, then consider this to be a false positive.
Solution
Upgrade to Squid version 3.5.17 / 4.0.9 or later. Alternatively, apply the vendor-supplied patch.See Also
Plugin Details
Severity: High
ID: 91194
File Name: squid_4_0_9_cachemgr_cgi.nasl
Version: 1.5
Type: remote
Family: Firewalls
Published: 5/17/2016
Updated: 11/19/2019
Configuration: Enable paranoid mode
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2016-4051
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 7.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:squid-cache:squid
Required KB Items: Settings/ParanoidReport, www/squid
Exploit Ease: No known exploits are available
Patch Publication Date: 4/20/2016
Vulnerability Publication Date: 4/20/2016
Reference Information
CVE: CVE-2016-4051