Published:2014/06/24  Last Updated:2014/06/25

Sophos Disk Encryption vulnerable to authentication bypass


Sophos Disk Encryption contains an authentication bypass vulnerability.

Products Affected

  • Sophos Disk Encryption 5.61 managed through Sophos Enterprise Console (SEC) Ver. 5.1, 5.2, 5.2.1 and 5.2.1R2


Sophos Disk Encryption is a product to encrypt hard disk data on Windows PC. By default, Window requires logon authentication when the PC wakes up from hibernation or sleep mode. When Sophos Disk Encryption is installed, no authentication is required before operating the PC.


An unauthenticated attacker may compromise the computer and gain control over it.


Update the Software
Update Sophos Enterprise Console (SEC) to 5.2.2 or later version according to the information provided by the developer.

Apply the workaround
The following workaround may mitigate the affects of this vulnerability.

  • Edit Group policy or Local Group Policy depending on the Windows network environment (domain / workgroup).

For more information, please refer to the developer's website.

Vendor Status

Vendor Status Last Update Vendor Notes
Sophos KK Vulnerable 2014/06/24 Sophos KK website


  1. IPA
    About Authentication Bypass vulnerability in Sophos Disk Encryption (JVN#63940326)

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2014.06.24 (CVSS Base Metrics)

What is CVSS?

Measures Severity Description
Access Vector(AV) Local (L) Adjacent Network (A) Network (N) A vulnerability exploitable with only local access requires the attacker to have either physical access to the vulnerable system or a local (shell) account.
Access Complexity(AC) High (H) Medium (M) Low (L) The access conditions are somewhat specialized.
Authentication(Au) Multiple (M) Single (S) None (N) Authentication is not required to exploit the vulnerability.
Confidentiality Impact(C) None (N) Partial (P) Complete (C) There is total information disclosure, resulting in all system files being revealed.
Integrity Impact(I) None (N) Partial (P) Complete (C) There is no impact to the integrity of the system.
Availability Impact(A) None (N) Partial (P) Complete (C) There is no impact to the availability of the system.

Base Score:4.7


Cybozu Inc. Security Incident Response Team reported this vulnerability to the developer.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2014-2005
JVN iPedia JVNDB-2014-000061

Update History

Information under the section "References" was added.