CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.3 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, has been found in Linux Kernel up to 4.9.12 (Operating System). This issue affects an unknown code block of the component llc Subsystem. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:
The LLC subsystem in the Linux kernel before 4.9.13 does not ensure that a certain destructor exists in required circumstances, which allows local users to cause a denial of service (BUG_ON) or possibly have unspecified other impact via crafted system calls.
The bug was discovered 02/28/2017. The weakness was published 03/01/2017 by Salvatore Bonaccorso (oss-sec). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2017-6345 since 02/26/2017. An attack has to be approached locally. The requirement for exploitation is a simple authentication. Neither technical details nor an exploit are publicly available.
The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 97640 (Debian DLA-849-1 : linux security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175984 (Debian Security Update for Linux (DSA 3804-1)).
Upgrading to version 4.9.13 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (97640). Similar entries are available at 97226, 97281, 97446 and 97448.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.5VulDB Meta Temp Score: 6.4
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.8
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Input validationCWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 97640
Nessus Name: Debian DLA-849-1 : linux security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 703804
OpenVAS Name: Debian Security Advisory DSA 3804-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: Kernel 4.9.13
Patch: git.kernel.org
Timeline
02/26/2017 🔍02/28/2017 🔍
02/28/2017 🔍
03/01/2017 🔍
03/01/2017 🔍
03/02/2017 🔍
03/09/2017 🔍
03/10/2017 🔍
09/03/2020 🔍
Sources
Vendor: kernel.orgAdvisory: openwall.com
Researcher: Salvatore Bonaccorso
Status: Not defined
Confirmation: 🔍
CVE: CVE-2017-6345 (🔍)
OVAL: 🔍
SecurityFocus: 96510 - Linux kernel CVE-2017-6345 Local Denial of Service Vulnerability
OSVDB: - CVE-2017-6345 - Linux - Denial of Service Issue
See also: 🔍
Entry
Created: 03/02/2017 09:28Updated: 09/03/2020 14:02
Changes: 03/02/2017 09:28 (82), 09/03/2020 14:02 (6)
Complete: 🔍
Cache ID: 3:E15:103
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