Security Vulnerabilities - CVEs Published In 2019
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware image contains encrypted passwords that are used to authenticate users wishing to access a diagnostics or password-recovery menu. Using the hardcoded cryptographic key found elsewhere in the firmware, these passwords can be decrypted. This is related to fds_sys_passDebugPasswd_ret() and fds_sys_passRecoveryPasswd_ret() in libfds.so.0.0.
CVSS Score
7.5
EPSS Score
0.003
Published
2019-11-14
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware hashes and encrypts passwords using a hardcoded cryptographic key in sal_util_str_encrypt() in libsal.so.0.0. The parameters (salt, IV, and key data) are used to encrypt and decrypt all passwords using AES256 in CBC mode. With the parameters known, all previously encrypted passwords can be decrypted. This includes the passwords that are part of configuration backups or otherwise embedded as part of the firmware.
CVSS Score
5.9
EPSS Score
0.003
Published
2019-11-14
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fds_sys_passDebugPasswd_ret(). The firmware contains access control checks that determine if remote users are allowed to access this functionality. The function that performs this check (fds_sys_remoteDebugEnable_ret in libfds.so) always return TRUE with no actual checks performed. The diagnostics menu allows for reading/writing arbitrary registers and various other configuration parameters which are believed to be related to the network interface chips.
CVSS Score
9.1
EPSS Score
0.004
Published
2019-11-14
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. By sending a signal to the CLI process, undocumented functionality is triggered. Specifically, a menu can be triggered by sending the SIGQUIT signal to the CLI application (e.g., through CTRL+\ via SSH). The access control check for this menu does work and prohibits accessing the menu, which contains "Password recovery for specific user" options. The menu is believed to be accessible using a serial console.
CVSS Score
7.5
EPSS Score
0.002
Published
2019-11-14
Multiple unspecified vulnerabilities in Cryptocat Project Cryptocat 2.0.18 have unknown impact and attack vectors.
CVSS Score
9.8
EPSS Score
0.006
Published
2019-11-14
Improper invalidation for page table updates by a virtual guest operating system for multiple Intel(R) Processors may allow an authenticated user to potentially enable denial of service of the host system via local access.
CVSS Score
6.5
EPSS Score
0.003
Published
2019-11-14
Insufficient access control in protected memory subsystem for Intel(R) SGX for 6th, 7th, 8th, 9th Generation Intel(R) Core(TM) Processor Families; Intel(R) Xeon(R) Processor E3-1500 v5, v6 Families; Intel(R) Xeon(R) E-2100 & E-2200 Processor Families with Intel(R) Processor Graphics may allow a privileged user to potentially enable information disclosure via local access.
CVSS Score
4.4
EPSS Score
0.001
Published
2019-11-14
Insufficient memory protection in Intel(R) 6th Generation Core Processors and greater, supporting SGX, may allow a privileged user to potentially enable escalation of privilege via local access.
CVSS Score
7.8
EPSS Score
0.001
Published
2019-11-14
Insufficient memory protection in Intel(R) 6th Generation Core Processors and greater, supporting TXT, may allow a privileged user to potentially enable escalation of privilege via local access.
CVSS Score
7.8
EPSS Score
0.001
Published
2019-11-14
Insufficient memory protection in Intel(R) TXT for certain Intel(R) Core Processors and Intel(R) Xeon(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.
CVSS Score
6.7
EPSS Score
0.002
Published
2019-11-14