Vulnerability Details : CVE-2014-2038
The nfs_can_extend_write function in fs/nfs/write.c in the Linux kernel before 3.13.3 relies on a write delegation to extend a write operation without a certain up-to-date verification, which allows local users to obtain sensitive information from kernel memory in opportunistic circumstances by writing to a file in an NFS filesystem and then reading the same file.
Vulnerability category: Information leak
Exploit prediction scoring system (EPSS) score for CVE-2014-2038
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2014-2038
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:P/I:N/A:N |
3.9
|
2.9
|
NIST |
CWE ids for CVE-2014-2038
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The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2014-2038
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http://www.ubuntu.com/usn/USN-2140-1
USN-2140-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
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http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=263b4509ec4d47e0da3e753f85a39ea12d1eff24
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https://github.com/torvalds/linux/commit/263b4509ec4d47e0da3e753f85a39ea12d1eff24
nfs: always make sure page is up-to-date before extending a write to … · torvalds/linux@263b450 · GitHubPatch;Third Party Advisory
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http://www.ubuntu.com/usn/USN-2137-1
USN-2137-1: Linux kernel (Saucy HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
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http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.3
Release Notes;Vendor Advisory
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http://www.openwall.com/lists/oss-security/2014/02/20/16
oss-security - Re: Re: CVE request: Linux kernel: nfs: information leakageMailing List;Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=1066939
1066939 – (CVE-2014-2038) CVE-2014-2038 kernel: nfs: data leak during extended writesIssue Tracking;Patch;Third Party Advisory
Products affected by CVE-2014-2038
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*