CVE-2021-28153 Information

Description

An issue was discovered in GNOME GLib before 2.66.8. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION to replace a path that is a dangling symlink it incorrectly also creates the target of the symlink as an empty file which could conceivably have security relevance if the symlink is attacker-controlled. (If the path is a symlink to a file that already exists then the contents of that file correctly remain unchanged.)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://gitlab.gnome.org/GNOME/glib/-/issues/2325 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6RXTD5HCP2K4AAUSWWZTBKQNHRCTAEOF/ https://security.netapp.com/advisory/ntap-20210416-0003/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICUTQPHZNZWX2DZR46QFLQZRHVMHIILJ/ https://security.gentoo.org/glsa/202107-13

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3