SB2022112538 - openEuler update for freerdp

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Absolute Path Traversal (CVE-ID: CVE-2022-39347)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to missing path canonicalization and base path check for drive channel. A malicious server can trick the FreeRDP client to read files outside the shared directory.

2) Out-of-bounds read (CVE-ID: CVE-2022-39316)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in ZGFX decoder. A malicious server can trick a FreeRDP based client to read out of bound data and try to decode it.

Successful exploitation of the vulnerability may allows remote code execution.

3) Out-of-bounds read (CVE-ID: CVE-2022-39319)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in urbdrc channel.  A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the server.

4) Out-of-bounds read (CVE-ID: CVE-2022-41877)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the drive channel. A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the server.

5) Division by zero (CVE-ID: CVE-2022-39318)

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a division by zero error in urbdrc channel. A malicious server can pass specially crafted data to the application and crash it.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-2112