SB2019071744 - Fedora 29 update for gvfs

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Main Vulnerability Database SB2019071744

SB2019071744 - Fedora 29 update for gvfs

Published: July 17, 2019 Updated: April 25, 2025

Security Bulletin ID SB2019071744
Severity
Critical
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Critical 50% High 25% Low 25%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-12795)

The vulnerability allows a local attacker to escalate privileges on the system.

The vulnerability exists due to the daemon/gvfsdaemon.c opened a private D-Bus server socket without configuring an authorization rule. A local attacker can connect to this server socket and issue D-Bus method calls. 


2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-12447)

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to functionality in the daemon/gvfsbackendadmin.c file doesn't make use of "setfsuid" call when handling ownership permissions. A remote attacker can gain unauthorized access to arbitrary files on a system.


3) Race condition (CVE-ID: CVE-2019-12448)

The vulnerability allows a remote attacker to overwrite or access sensitive information, or cause a denial of service (DoS) condition on a targeted system.

The vulnerability exists due to race conditions in the daemon/gvfsbackendadmin.c source code file because the admin backend does not implement the query_info_on_read/write functionality. A remote attacker can send a request with malicious input to the system and cause race condition that will allow to overwrite or access sensitive information or cause a DoS condition.

4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-12449)

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to mishandling of file user and group ownership in the daemon/gvfsbackendadmin.c file. Operations "G_FILE_COPY_ALL_METADATA" from admin:// URIs to file:// URIs during move-and-copy are handled by the Gnome Input/Output (GIO) fallback code, which does not run with root permissions. A remote attacker can gain unauthorized access to arbitrary file information on a system.


Remediation

Install update from vendor's website.

References