cURL up to 7.85.x HSTS missing encryption

Summaryinfo

A vulnerability was found in cURL up to 7.85.x. It has been rated as problematic. The affected element is an unknown function of the component HSTS Handler. The manipulation leads to missing encryption. This vulnerability is documented as CVE-2022-42916. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in cURL up to 7.85.x (Network Utility Software). It has been rated as problematic. This issue affects an unknown function of the component HSTS Handler. The manipulation with an unknown input leads to a missing encryption vulnerability. Using CWE to declare the problem leads to CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. Impacted is confidentiality. The summary by CVE is:

In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.

The weakness was released 10/29/2022. It is possible to read the advisory at curl.se. The identification of this vulnerability is CVE-2022-42916 since 10/13/2022. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 211079 (Fedora 37 : curl (2022-e9d65906c4)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 7.86.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (211079). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Network Utility Software

Name

• cURL

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6
• 7.7
• 7.8
• 7.9
• 7.10
• 7.11
• 7.12
• 7.13
• 7.14
• 7.15
• 7.16
• 7.17
• 7.18
• 7.19
• 7.20
• 7.21
• 7.22
• 7.23
• 7.24
• 7.25
• 7.26
• 7.27
• 7.28
• 7.29
• 7.30
• 7.31
• 7.32
• 7.33
• 7.34
• 7.35
• 7.36
• 7.37
• 7.38
• 7.39
• 7.40
• 7.41
• 7.42
• 7.43
• 7.44
• 7.45
• 7.46
• 7.47
• 7.48
• 7.49
• 7.50
• 7.51
• 7.52
• 7.53
• 7.54
• 7.55
• 7.56
• 7.57
• 7.58
• 7.59
• 7.60
• 7.61
• 7.62
• 7.63
• 7.64
• 7.65
• 7.66
• 7.67
• 7.68
• 7.69
• 7.70
• 7.71
• 7.72
• 7.73
• 7.74
• 7.75
• 7.76
• 7.77
• 7.78
• 7.79
• 7.80
• 7.81
• 7.82
• 7.83
• 7.84
• 7.85

License

• open-source

CPE 2.3info

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CPE 2.2info

• 🔍
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Entryinfo

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

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