VDB-97591 · CVE-2016-6242 · BID 91805

OpenBSD 5.8/5.9 kevent System Call numeric error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in OpenBSD 5.8/5.9. Affected is an unknown function of the component kevent System Call Handler. This manipulation causes numeric error. This vulnerability is handled as CVE-2016-6242. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability has been found in OpenBSD 5.8/5.9 (Operating System) and classified as problematic. Affected by this vulnerability is an unknown code of the component kevent System Call Handler. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect availability. The summary by CVE is:

OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (assertion failure and kernel panic) via a large ident value in a kevent system call.

The bug was discovered 06/27/2016. The weakness was released 03/07/2017 by Jesse Hertz (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2016-6242 since 07/17/2016. Attacking locally is a requirement. A single authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly 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 vulnerability is also documented in the vulnerability database at SecurityFocus (BID 91805†). Entries connected to this vulnerability are available at VDB-97589, VDB-97590, VDB-97592 and VDB-97594. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB 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: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/27/2016 🔍
07/17/2016 +20 days 🔍
07/17/2016 +0 days 🔍
03/07/2017 +233 days 🔍
03/07/2017 +0 days 🔍
03/07/2017 +0 days 🔍
09/04/2020 +1277 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Jesse Hertz
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6242 (🔍)
GCVE (CVE): GCVE-0-2016-6242
GCVE (VulDB): GCVE-100-97591
SecurityFocus: 91805 - OpenBSD Multiple Memory Corruption and Denial of Service Vulnerabilities
OSVDB: - CVE-2016-6242 - OpenBSD - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 03/07/2017 21:47
Updated: 09/04/2020 12:54
Changes: 03/07/2017 21:47 (60), 09/04/2020 12:54 (6)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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