Security restrictions bypass in GNOME GLib



Published: 2021-03-15
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-28153
CWE-ID CWE-61
Exploitation vector Local
Public exploit N/A
Vulnerable software
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Gnome GLib
Universal components / Libraries / Libraries used by multiple products

Vendor Gnome Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) UNIX symbolic link following

EUVDB-ID: #VU51454

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-28153

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

Exploit availability: No

Description

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

The vulnerability exists due to a symlink following issue, when g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.

Successful exploitation of this vulnerability may result in privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gnome GLib: 2.66.0 - 2.67.5


CPE2.3 External links

http://gitlab.gnome.org/GNOME/glib/-/issues/2325

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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