OpenBSD up to 7.4 pf toctou

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in OpenBSD up to 7.4 and classified as critical. This affects an unknown part of the component pf. This manipulation causes toctou. This vulnerability appears as CVE-2023-52556. The attack may be initiated remotely. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability has been found in OpenBSD up to 7.4 (Operating System) and classified as critical. Affected by this vulnerability is an unknown part of the component pf. The manipulation with an unknown input leads to a toctou vulnerability. The CWE definition for the vulnerability is CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. As an impact it is known to affect availability. The summary by CVE is:

In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.

The weakness was presented 03/01/2024. The advisory is shared at ftp.openbsd.org. This vulnerability is known as CVE-2023-52556. Neither technical details nor an exploit are publicly available.

Applying the patch 7.4 Errata 009 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.2
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 7.4 Errata 009

Timelineinfo

03/01/2024 🔍
03/01/2024 +0 days 🔍
03/01/2024 +0 days 🔍
11/14/2024 +258 days 🔍

Sourcesinfo

Advisory: 9d9f4dc6c833cb79d13f836581e3a781d06842e7
Status: Confirmed

CVE: CVE-2023-52556 (🔍)
GCVE (CVE): GCVE-0-2023-52556
GCVE (VulDB): GCVE-100-255433

Entryinfo

Created: 03/01/2024 17:46
Updated: 11/14/2024 21:54
Changes: 03/01/2024 17:46 (39), 04/04/2024 02:20 (17), 11/14/2024 21:54 (13)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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