Vulnerability Details : CVE-2017-12192
The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.
Vulnerability category: Denial of service
Products affected by CVE-2017-12192
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-12192
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-2017-12192
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2017-12192
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-12192
-
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
Vendor Advisory
-
https://usn.ubuntu.com/3583-1/
USN-3583-1: Linux kernel vulnerabilities | Ubuntu security notices
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https://access.redhat.com/errata/RHSA-2018:0151
RHSA-2018:0151 - Security Advisory - Red Hat Customer Portal
-
https://bugzilla.redhat.com/show_bug.cgi?id=1493435
1493435 – (CVE-2017-12192) CVE-2017-12192 kernel: NULL pointer dereference due to KEYCTL_READ on negative keyIssue Tracking;Third Party Advisory
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https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678
KEYS: prevent KEYCTL_READ on negative key · torvalds/linux@37863c4 · GitHubPatch;Vendor Advisory
-
https://lkml.org/lkml/2017/9/18/764
LKML: Eric Biggers: [PATCH] KEYS: prevent KEYCTL_READ on negative keyMailing List;Third Party Advisory
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https://usn.ubuntu.com/3583-2/
USN-3583-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices
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