Headline
CVE-2022-43096: DGW Security Improvement Notes v48.5.2718 - Mediatrix
Mediatrix 4102 before v48.5.2718 allows local attackers to gain root access via the UART port.
DGW Application 48.5.2718
- Summary
- Security changes
Summary
ID
Synopsis
DGW-14973
SIP: Support additional DHE ciphers
DGW-15007
User passwords are now securely hashed
DGW-15338
OWASP: Disable access to internal UART
DGW-15442
CVE-2022-0778: Possible Denial of Service (DoS) from purposedly crafted TLS certificate
**Security changes
**
DGW-15442 - CVE-2022-0778: Possible Denial of Service (DoS) from purposedly crafted TLS certificate
An important security flaw was found in the OpenSSL library affecting DGW version 48.4 and below. If exploited successfully, this vulnerability could cause the unit to reboot unexpectedly.
The CVE-2022-0778 has been addressed by upgrading the OpenSSL library to version 1.1.1n.
DGW-15338 - OWASP: Disable access to internal UART
Follow OWASP IoT Verification Requirement C.1:Verify that application layer debugging interfaces such USB, UART, and other serial variants are disabled or protected by a complex password.
DGW-15007 - User passwords are now securely hashed
User passwords are no longer saved in clear text, but instead saved in a cryptographically secure way, using the PBKDF2-HMAC-SHA256 hash algorithm.
Previously, when exporting a backup or configuration script, the passwords could be read in clear-text. Now, only the hashed passwords are visible.
A user cannot retrieve a forgotten password anymore, since it is impossible to reverse a hashed password into a clear-text password. In case all passwords are forgotten, a partial reset or factory reset can be done to restore to the factory initial passwords.
DGW-14973 - SIP: Support additional DHE ciphers
The SipEp service now supports the following DHE ciphers when using SIP over TLS:
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
- TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
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