kernel: Race conditions in collect_mounts
Published May 2, 2016
5.5
MEDIUMCVSS 3.0
EPSS 0.37%
Description
The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denial of service (system crash) by leveraging user-namespace root access for an MNT_DETACH umount2 system call.
Affected products
No data.
- ≤ 4.0.4
No data.
Red Hat Enterprise Linux 4
kernel
Not affected
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise MRG 2
realtime-kernel
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 5, 6, MRG-2, realtime and arm-kernels. The issue is not currently planned to be addressed in Red Hat Enterprise Linux 7.
References (10)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae x_refsource_CONFIRMVendor Advisory
- http://openwall.com/lists/oss-security/2015/05/29/10 mailing-listx_refsource_MLIST
- http://openwall.com/lists/oss-security/2015/05/29/5 mailing-listx_refsource_MLIST
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2015/06/04/5 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2015-4177 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1248486 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-4177
- https://www.cve.org/CVERecord?id=CVE-2015-4177
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae | x_refsource_CONFIRMVendor Advisory | |
| http://openwall.com/lists/oss-security/2015/05/29/10 | mailing-listx_refsource_MLIST | |
| http://openwall.com/lists/oss-security/2015/05/29/5 | mailing-listx_refsource_MLIST | |
| http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5 | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2015/06/04/5 | mailing-listx_refsource_MLIST | |
| https://access.redhat.com/security/cve/CVE-2015-4177 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1248486 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae | x_refsource_CONFIRMVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-4177 | ||
| https://www.cve.org/CVERecord?id=CVE-2015-4177 |
Change history (0)
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