Permissions, Privileges, and Access Controls in Debian Linux - CVE-2015-3202
Published: July 3, 2015 / Updated: August 9, 2020
Vulnerability identifier: #VU40704
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-3202
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.
fusermount in FUSE before 2.9.3-15 does not properly clear the environment before invoking (1) mount or (2) umount as root, which allows local users to write to arbitrary files via a crafted LIBMOUNT_MTAB environment variable that is used by mount's debugging feature.
Affected software
Debian Linux
Amazon Linux AMI
Gentoo Linux
Fedora
fuse
ntfs-3g
Amazon Linux AMI
Gentoo Linux
Fedora
fuse
ntfs-3g
How to mitigate CVE-2015-3202
Install update from vendor's website.
fuse - addressed in versions 2.9.4-1.fc21, 2.9.4-1.fc22
ntfs-3g - addressed in versions 2015.3.14-2.el6, 2015.3.14-2.el7, 2015.3.14-2.fc21, 2015.3.14-2.fc22
ntfs-3g - addressed in versions 2015.3.14-2.el6, 2015.3.14-2.el7, 2015.3.14-2.fc21, 2015.3.14-2.fc22
Links to Public Exploits and PoC-codes
External References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159298.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159543.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159683.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159831.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160094.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160106.html
- http://lists.opensuse.org/opensuse-updates/2015-06/msg00005.html
- http://lists.opensuse.org/opensuse-updates/2015-06/msg00007.html
- http://packetstormsecurity.com/files/132021/Fuse-Local-Privilege-Escalation.html
- http://www.debian.org/security/2015/dsa-3266
- http://www.debian.org/security/2015/dsa-3268
- http://www.openwall.com/lists/oss-security/2015/05/21/9
- http://www.securityfocus.com/bid/74765
- http://www.securitytracker.com/id/1032386
- http://www.ubuntu.com/usn/USN-2617-1
- http://www.ubuntu.com/usn/USN-2617-2
- http://www.ubuntu.com/usn/USN-2617-3
- https://gist.github.com/taviso/ecb70eb12d461dd85cba
- https://security.gentoo.org/glsa/201603-04
- https://security.gentoo.org/glsa/201701-19
- https://twitter.com/taviso/status/601370527437967360
- https://www.exploit-db.com/exploits/37089/