Ubuntu.comUB:CVE-2016-6213CVE-2016-6213
4.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:N/I:N/A:C
0.0004 Low
EPSS
Percentile
5.3%
fs/namespace.c in the Linux kernel before 4.9 does not restrict how many
mounts may exist in a mount namespace, which allows local users to cause a
denial of service (memory consumption and deadlock) via MS_BIND mount
system calls, as demonstrated by a loop that triggers exponential growth in
the number of mounts.
Notes
| Author | Note |
|---|---|
| jdstrand | android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support |
| sbeattie | The fix for this issue introduces a new /proc/sys/fs/mount-max sysctl that can be used to adjust the limit |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 14.04 | noarch | linux | < 3.13.0-106.153 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | < 4.4.0-57.78 | UNKNOWN |
| ubuntu | 16.10 | noarch | linux | < 4.8.0-32.34 | UNKNOWN |
| ubuntu | 12.04 | noarch | linux-lts-trusty | < 3.13.0-106.153~precise1 | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-lts-vivid | < 3.19.0-78.86~14.04.1 | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-lts-xenial | < 4.4.0-57.78~14.04.1 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-raspi2 | < 4.4.0-1038.45 | UNKNOWN |
| ubuntu | 16.10 | noarch | linux-raspi2 | < 4.8.0-1021.24 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-snapdragon | < 4.4.0-1042.46 | UNKNOWN |
| ubuntu | 16.10 | noarch | linux-snapdragon | < 4.4.0-1046.50 | UNKNOWN |
References
www.openwall.com/lists/oss-security/2016/07/13/6
launchpad.net/bugs/cve/CVE-2016-6213
nvd.nist.gov/vuln/detail/CVE-2016-6213
security-tracker.debian.org/tracker/CVE-2016-6213
ubuntu.com/security/notices/USN-3160-1
ubuntu.com/security/notices/USN-3160-2
ubuntu.com/security/notices/USN-3161-1
ubuntu.com/security/notices/USN-3161-2
ubuntu.com/security/notices/USN-3161-3
ubuntu.com/security/notices/USN-3161-4
ubuntu.com/security/notices/USN-3162-1
ubuntu.com/security/notices/USN-3162-2
www.cve.org/CVERecord?id=CVE-2016-6213
Related
4.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:N/I:N/A:C
0.0004 Low
EPSS
Percentile
5.3%