OpenBSD 5.8/5.9 kern/kern_synch.c thrsleep tsp input validation
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.5 | $0-$5k | 0.00 |
A vulnerability was found in OpenBSD 5.8/5.9 (Operating System) and classified as problematic. Affected by this issue is the function thrsleep
of the file kern/kern_synch.c. The manipulation of the argument tsp
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 availability. CVE summarizes:
thrsleep in kern/kern_synch.c in OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (kernel panic) via a crafted value in the tsp parameter of the __thrsleep system call.
The bug was discovered 06/27/2016. The weakness was disclosed 03/07/2017 by Jesse Hertz (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2016-6243 since 07/17/2016. The attack needs to be approached locally. The requirement for exploitation is a simple authentication. There are known technical details, but no exploit is available.
The vulnerability was handled as a non-public zero-day exploit for at least 253 days. During that time the estimated underground price was around $0-$5k.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
The entries 97589, 97590, 97591 and 97594 are pretty similar.
Product
Type
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: 5.5VulDB Meta Temp Score: 5.5
VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.5
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 |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔍
Timeline
06/27/2016 🔍07/17/2016 🔍
07/17/2016 🔍
03/07/2017 🔍
03/07/2017 🔍
03/07/2017 🔍
09/04/2020 🔍
Sources
Advisory: openwall.comResearcher: Jesse Hertz
Status: Not defined
Confirmation: 🔍
CVE: CVE-2016-6243 (🔍)
SecurityFocus: 91805 - OpenBSD Multiple Memory Corruption and Denial of Service Vulnerabilities
OSVDB: - CVE-2016-6243 - OpenBSD - Denial of Service Issue
See also: 🔍
Entry
Created: 03/07/2017 21:47Updated: 09/04/2020 12:47
Changes: 03/07/2017 21:47 (61), 09/04/2020 12:47 (6)
Complete: 🔍
Cache ID: 3:ACA:103
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