Apple macOS up to 13.4.1 curl race condition

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Apple macOS up to 13.4.1. This vulnerability affects unknown code of the component curl. Executing a manipulation can lead to an unknown weakness. This vulnerability appears as CVE-2023-28320. The attack requires local access. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS up to 13.4.1 (Operating System). It has been declared as problematic. This vulnerability affects an unknown functionality of the component curl. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.

The weakness was presented 07/24/2023 as HT213843 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2023-28320. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The advisory points out:

Multiple issues in curl

The vulnerability scanner Nessus provides a plugin with the ID 215401 (Azure Linux 3.0 Security Update: cmake / curl / mysql / rust / tensorflow (CVE-2023-28320)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 13.5 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Multiple issues were addressed by updating curl.

The vulnerability is also documented in the databases at Tenable (215401) and EUVD (EUVD-2023-32027). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

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: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CNA Base Score: 5.9
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Race condition
CWE: 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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Nessus ID: 215401
Nessus Name: Azure Linux 3.0 Security Update: cmake / curl / mysql / rust / tensorflow (CVE-2023-28320)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: macOS 13.5

Timelineinfo

03/14/2023 🔍
07/24/2023 +131 days 🔍
07/24/2023 +0 days 🔍
07/25/2023 +1 days 🔍
12/04/2025 +863 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213843
Status: Confirmed

CVE: CVE-2023-28320 (🔍)
GCVE (CVE): GCVE-0-2023-28320
GCVE (VulDB): GCVE-100-235348
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 07/25/2023 12:17
Updated: 12/04/2025 19:32
Changes: 07/25/2023 12:17 (17), 07/25/2023 12:20 (28), 08/18/2023 08:11 (1), 08/18/2023 08:15 (12), 01/15/2025 17:57 (27), 02/11/2025 03:13 (2), 04/24/2025 22:52 (3), 12/04/2025 19:32 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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