OpenBSD up to 7.3 Errata 013 Console Terminal Emulation memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in OpenBSD up to 7.3 Errata 013. Impacted is an unknown function of the component Console Terminal Emulation. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2023-40216. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in OpenBSD up to 7.3 Errata 013 (Operating System). It has been declared as critical. This vulnerability affects an unknown function of the component Console Terminal Emulation. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

OpenBSD 7.3 before errata 014 is missing an argument-count bounds check in console terminal emulation. This could cause incorrect memory access and a kernel crash after receiving crafted DCS or CSI terminal escape sequences.

The weakness was shared 08/10/2023 as 9d3f688f46eba347e96ff0ae9506ef2061622e0c. The advisory is shared for download at github.com. This vulnerability was named CVE-2023-40216 since 08/10/2023. There are neither technical details nor an exploit publicly available.

Upgrading to version 7.3 Errata 014 eliminates this vulnerability. Applying the patch 9d3f688f46eba347e96ff0ae9506ef2061622e0c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-44813). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

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: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenBSD 7.3 Errata 014
Patch: 9d3f688f46eba347e96ff0ae9506ef2061622e0c

Timelineinfo

08/10/2023 🔍
08/10/2023 +0 days 🔍
08/10/2023 +0 days 🔍
01/27/2026 +901 days 🔍

Sourcesinfo

Advisory: 9d3f688f46eba347e96ff0ae9506ef2061622e0c
Status: Confirmed

CVE: CVE-2023-40216 (🔍)
GCVE (CVE): GCVE-0-2023-40216
GCVE (VulDB): GCVE-100-236824
EUVD: 🔍

Entryinfo

Created: 08/10/2023 20:42
Updated: 01/27/2026 16:56
Changes: 08/10/2023 20:42 (43), 09/05/2023 10:57 (10), 01/27/2026 16:56 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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