Race condition in Calamares - CVE-2019-13178
Published: December 5, 2019
Vulnerability identifier: #VU23408
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-13178
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in modules/luksbootkeyfile/main.py when creating LUKS encryption keyfile. A local user can exploit the race and gain unauthorized access to sensitive information in the encryption file while the application sets permissions on the file.
Affected software
Calamares
Opensuse
SUSE Linux
Fedora
calamares
Opensuse
SUSE Linux
Fedora
calamares
How to mitigate CVE-2019-13178
Install updates from vendor's website.
Calamares - update to 3.2.11
calamares - addressed in versions 3.2.11-1.fc29, 3.2.11-1.fc30
calamares - addressed in versions 3.2.11-1.fc29, 3.2.11-1.fc30
External References
- https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1835095
- https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1835096
- https://bugzilla.redhat.com/show_bug.cgi?id=1726565
- https://calamares.io/calamares-3.2.11-is-out/
- https://calamares.io/calamares-cve-2019/
- https://github.com/calamares/calamares/issues/1190
- https://github.com/calamares/calamares/issues/1191
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Q57BOTBA2J5U4GVKUP7N2PD5H7B3BVUU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R2ZDQRGBGRVRW5LPJWKUNS3M66LZ3KYC/
- https://www.pavelkogan.com/2014/05/23/luks-full-disk-encryption/
- https://www.pavelkogan.com/2015/01/25/linux-mint-encryption/