CVE-2019-13228 Information

Description

deepin-clone before 1.1.3 uses a fixed path /tmp/repo.iso in the BootDoctor::fix() function to download an ISO file and follows symlinks there. An unprivileged user can prepare a symlink attack there to create or overwrite files in arbitrary file system locations. The content is not attacker controlled. By winning a race condition to replace the /tmp/repo.iso symlink by an attacker controlled ISO file further privilege escalation may be possible.

CVSS Vector

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Reference

http://www.openwall.com/lists/oss-security/2019/07/04/1 https://bugzilla.suse.com/show_bug.cgi?id=1130388 https://github.com/linuxdeepin/deepin-clone/commit/e079f3e2712b4f8c28e3e63e71ba1a1f90fce1ab https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TCHGRJV5CWTMYEE5B5C2FNMCFVP45S7H/

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

4.7