Vulnerability Details : CVE-2020-25212
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-25212
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-25212
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-25212
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.4
|
MEDIUM | AV:L/AC:M/Au:N/C:P/I:P/A:P |
3.4
|
6.4
|
NIST | |
|
7.0
|
HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.0
|
5.9
|
NIST |
CWE ids for CVE-2020-25212
-
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.Assigned by: nvd@nist.gov (Primary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-25212
-
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21
kernel/git/torvalds/linux.git - Linux kernel source treeMailing List;Patch;Vendor Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
[security-announce] openSUSE-SU-2020:1698-1: important: Security updateMailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
[SECURITY] [DLA 2420-2] linux regression updateMailing List;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
Mailing List;Third Party Advisory
-
https://twitter.com/grsecurity/status/1303370421958578179
grsecurity on Twitter: "https://t.co/kiTL438tB1" / TwitterThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
[SECURITY] [DLA 2385-1] linux-4.19 security updateMailing List;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.html
[security-announce] openSUSE-SU-2020:1682-1: important: Security updateMailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
[SECURITY] [DLA 2420-1] linux security updateMailing List;Third Party Advisory
-
https://usn.ubuntu.com/4525-1/
USN-4525-1: Linux kernel vulnerabilities | Ubuntu security notices | UbuntuThird Party Advisory
-
https://usn.ubuntu.com/4578-1/
USN-4578-1: Linux kernel vulnerabilities | Ubuntu security notices | UbuntuThird Party Advisory
-
https://usn.ubuntu.com/4527-1/
USN-4527-1: Linux kernel vulnerabilities | Ubuntu security notices | UbuntuThird Party Advisory
-
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3
Mailing List;Vendor Advisory
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