CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS
Percentile
95.5%
Watchguard Extensible Threat Management (XTM) version 11.7.4 and possibly earlier versions contain a buffer overflow vulnerability (CWE-121).
CWE-121: Stack-based Buffer Overflow
Watchguard Extensible Threat Management (XTM) version 11.7.4 and possibly earlier versions contain a buffer overflow vulnerability when reading large cookie requests. Remote administration is enabled by default on TCP/8080 for the virtual appliances (XTMv). The physical XTM appliances do not have this feature enabled by default.
WGagent is one of the processes running on the XTM appliance, which is responsible for parsing web cookies sent to the applianceβs web management interface. By creating a maliciously crafted cookie that contains an arbitrarily large sessionid
value and connecting to the XTM applianceβs web management interface, an unauthenticated attacker can exploit this vulnerability to execute code on the appliance.
The WGagent process runs with low privileges and from a chroot jail, but it does have enough privilege to access the configuration file and change passwords.
A remote unauthenticated attacker may be able to cause a denial of service, or execute arbitrary code on the appliance.
Apply an Update
Users are advised to apply the Watchguard XTM version 11.8 patch. If applying the patch is not possible, please consider the following workaround.
Restrict access to the Watchguard XTM interface
Restrict access to the Watchguard XTM web interface to trusted networks. If possible, configure management and transit networks for separate VLANs, or restrict access to the device using IP access lists.
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Notified: September 23, 2013 Updated: October 16, 2013
Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Group | Score | Vector |
---|---|---|
Base | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Temporal | 7.3 | E:POC/RL:OF/RC:C |
Environmental | 1.8 | CDP:ND/TD:L/CR:ND/IR:ND/AR:ND |
Thanks to Jerome Nokin (Research and Discovery) and Thierry Zoller (Coordination) from Verizon Enterprise Solutions (GCIS Threat and Vulnerability Management) for reporting this vulnerability.
This document was written by Adam Rauf.
CVE IDs: | CVE-2013-6021 |
---|---|
Date Public: | 2013-10-18 Date First Published: |