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             AUSCERT External Security Bulletin Redistribution

                      Norton App Lock Security Bypass
                             25 November 2019


        AusCERT Security Bulletin Summary

Product:           Norton App Lock
Publisher:         Symantec
Operating System:  Android
Impact/Access:     Unauthorised Access -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-18373  

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Norton App Lock Security Bypass

Last Updated November 18, 2019
Initial Publication Date November 13, 2019

Affected Products

|Norton AppLock                                         |
|CVE           |Affected Version(s)|Remediation         |
|CVE-2019-18373|Prior to |Upgrade to|


|CVE-2019-18373                                                               |
|Severity/   |Medium / 5.6 AV:P/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L                |
|CVSSv3:     |                                                                |
|References: |Security Focus: BID 110818 / NVD: CVE-2019-18373                |
|            |                                                                |
|Impact:     |Security Bypass                                                 |
|            |Norton App Lock, prior to, may be susceptible to a    |
|            |bypass exploit. In this type of circumstance, the exploit can   |
|Description:|allow the user to circumvent the app to prevent it from locking |
|            |other apps on the device, thereby allowing the individual to    |
|            |gain access.                                                    |


The issue was validated by the product team engineers. A Norton App Lock
update, version , has been released which addresses the
aforementioned issue. Note that the latest Norton App Lock release and patches
are available to customers through the Google Play Store. At this time, there
is no evidence of any exploitations or adverse customer impact from this issue.

Consider the following measures to reduce risk of attack:

  o Restrict access to administrative or management systems to authorized
    privileged users.
  o Restrict remote access to trusted/authorized systems only.
  o Run under the principle of least privilege, where possible, to limit the
    impact of potential exploit.
  o Keep all operating systems and applications current with vendor patches.
  o Follow a multi-layered approach to security. At a minimum, run both
    firewall and anti-malware applications to provide multiple points of
    detection and protection for both inbound and outbound threats.
  o Deploy network and host-based intrusion detection systems to monitor
    network traffic for signs of anomalous or suspicious activity. This may aid
    in the detection of attacks or malicious activity related to the
    exploitation of latent vulnerabilities.

  o CVE-2019-18373: Yasin Yilmaz <yasinyilmaz@email.com>

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