Detections
Analytics
Squid 3.5.13 / 4.0.4 / 4.0.5 Server Connection Error Handling DoS
medium Nessus Plugin ID 89052
Language:
Synopsis
The remote proxy server is potentially affected by a denial of service vulnerability.Description
According to its banner, the version of Squid running on the remote host is 3.5.13, 4.0.4, or 4.0.5. It is, therefore, potentially affected by a denial of service vulnerability due to improper handling of server connection errors in the FwdState::connectedToPeer() function. A remote attacker can exploit this, via a misconfigured client or server, to cause a denial of service condition when connecting to TLS or SSL servers.Note that only servers built with the --with-openssl option are vulnerable.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number. 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, consider this to be a false positive.
Solution
Upgrade to Squid version 3.5.14 / 4.0.6 or later. Alternatively, apply the vendor-supplied patch.See Also
Plugin Details
Severity: Medium
ID: 89052
File Name: squid_4_0_6.nasl
Version: 1.5
Type: remote
Family: Firewalls
Published: 3/1/2016
Updated: 11/20/2019
Configuration: Enable paranoid mode
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2016-2390
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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: 2/12/2016
Vulnerability Publication Date: 2/16/2016
Reference Information
CVE: CVE-2016-2390
BID: 83261