SB2022072945 - Fedora 37 update for libldb, samba
Published: July 29, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Memory leak (CVE-ID: CVE-2022-32742)
The vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due memory leak when handling SMB1 requests. A remote user with ability to write data to a file share can force the application to leak memory and gain access to potentially sensitive information.
2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-32744)
The vulnerability allows a remote user to force password change requests.
The vulnerability exists due to tickets received by the kpasswd service were decrypted without specifying that only that service's own keys should be tried. A remote user can force the server to accept tickets encrypted with any key and initiate password change requests for any Samba AD user.
3) Infinite loop (CVE-ID: CVE-2022-32745)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop when processing LDAP requests. A remote user can send a specially crafted LDAP request to the server, consume all available system resources and cause denial of service conditions.
4) Use-after-free (CVE-ID: CVE-2022-32746)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error when handling LDAP requests. A remote user with ability to edit privileged properties, such as userAccountControl, can send a specially crafted LDAP request to the server, trigger a use-after-free error and perform a denial of service (DoS) attack.
5) Security Features (CVE-ID: CVE-2020-17049)
The vulnerability allows a remote user to bypass authentication process.
The vulnerability exists due to security feature bypass issue in Kerberos. A remote administrator can bypass authentication process and gain unauthorized access to the application.
Remediation
Install update from vendor's website.