Python up to 3.6.3 URL Lib/webbrowser.py BROWSER injection ⚔ [Disputed]

Summaryinfo

A vulnerability classified as problematic has been found in Python up to 3.6.3. Affected by this issue is some unknown functionality in the library Lib/webbrowser.py of the component URL Handler. This manipulation of the argument BROWSER as part of Environment Variable causes injection. This vulnerability appears as CVE-2017-17522. The attack may be initiated remotely. There is no available exploit. The real existence of this vulnerability is still doubted at the moment.

Detailsinfo

A vulnerability classified as critical was found in Python up to 3.6.3 (Programming Language Software). Affected by this vulnerability is some unknown processing in the library Lib/webbrowser.py of the component URL Handler. The manipulation of the argument BROWSER as part of a Environment Variable leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Lib/webbrowser.py in Python through 3.6.3 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow remote attackers to conduct argument-injection attacks via a crafted URL.

The bug was discovered 12/14/2017. The weakness was presented 12/14/2017 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2017-17522 since 12/11/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

The real existence of this vulnerability is still doubted at the moment.

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 102207†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Programming Language Software

Name

• Python

Version

• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3

License

• open-source

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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