Atlassian Application Links up to 5.0.9/5.1.2/5.2.5 OAuthHelper xml external entity reference

Summaryinfo

A vulnerability was found in Atlassian Application Links up to 5.0.9/5.1.2/5.2.5. It has been classified as critical. This affects an unknown function of the component OAuthHelper. This manipulation causes xml external entity reference. This vulnerability appears as CVE-2017-18111. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Atlassian Application Links up to 5.0.9/5.1.2/5.2.5. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component OAuthHelper. The manipulation with an unknown input leads to a xml external entity reference vulnerability. The CWE definition for the vulnerability is CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The OAuthHelper in Atlassian Application Links before version 5.0.10, from version 5.1.0 before version 5.1.3, and from version 5.2.0 before version 5.2.6 used an XML document builder that was vulnerable to XXE when consuming a client OAuth request. This allowed malicious oauth application linked applications to probe internal network resources by requesting internal locations, read the contents of files and also cause an out of memory exception affecting availability via an XML External Entity vulnerability.

The weakness was presented 03/29/2019. This vulnerability is known as CVE-2017-18111 since 02/01/2018. The exploitation appears to be easy. The attack can be launched remotely. The requirement for exploitation is a single authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 5.0.10, 5.1.3 or 5.2.6 eliminates this vulnerability.

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Productinfo

Vendor

• Atlassian

Name

• Application Links

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8
• 5.0.9
• 5.1.0
• 5.1.1
• 5.1.2
• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3
• 5.2.4
• 5.2.5

License

• free

Website

• Vendor: https://www.atlassian.com/

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CPE 2.2info

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