Vulnerability Details : CVE-2014-4171
mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement the interaction between range notification and hole punching, which allows local users to cause a denial of service (i_mutex hold) by using the mmap system call to access a hole, as demonstrated by interfering with intended shmem activity by blocking completion of (1) an MADV_REMOVE madvise call or (2) an FALLOC_FL_PUNCH_HOLE fallocate call.
Vulnerability category: Denial of service
Products affected by CVE-2014-4171
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2014-4171
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 8 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2014-4171
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.7
|
MEDIUM | AV:L/AC:M/Au:N/C:N/I:N/A:C |
3.4
|
6.9
|
NIST |
References for CVE-2014-4171
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https://bugzilla.redhat.com/show_bug.cgi?id=1111180
1111180 – (CVE-2014-4171) CVE-2014-4171 Kernel: mm/shmem: denial of serviceIssue Tracking;Third Party Advisory
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http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00006.html
[security-announce] SUSE-SU-2014:1316-1: important: Security update forMailing List;Third Party Advisory
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http://www.ubuntu.com/usn/USN-2334-1
USN-2334-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://ozlabs.org/~akpm/mmots/broken-out/shmem-fix-faulting-into-a-hole-while-its-punched.patch
404 Not FoundThird Party Advisory
-
http://www.securitytracker.com/id/1030450
Linux Kernel shmem_fallocate() Bug Lets Local Users Deny Service - SecurityTrackerThird Party Advisory;VDB Entry
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http://rhn.redhat.com/errata/RHSA-2014-1318.html
RHSA-2014:1318 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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http://www.openwall.com/lists/oss-security/2014/06/18/11
oss-security - CVE-2014-4171 - Linux kernel mm/shmem.c denial of serviceMailing List;Third Party Advisory
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http://www.securityfocus.com/bid/68157
Linux Kernel 'shmem.c' CVE-2014-4171 Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
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http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00007.html
[security-announce] SUSE-SU-2014:1319-1: important: Security update forMailing List;Third Party Advisory
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http://rhn.redhat.com/errata/RHSA-2015-0102.html
RHSA-2015:0102 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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http://www.ubuntu.com/usn/USN-2335-1
USN-2335-1: Linux kernel (OMAP4) vulnerabilities | Ubuntu security noticesThird Party Advisory
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http://marc.info/?l=linux-mm-commits&m=140303745420549&w=2
'+ shmem-fix-faulting-into-a-hole-while-its-punched.patch added to -mm tree' - MARCMailing List;Third Party Advisory
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