Checkstyle Plugin up to 3.49 on Jenkins XML Data xml external entity reference

Summaryinfo

A vulnerability, which was classified as critical, was found in Checkstyle Plugin up to 3.49 on Jenkins. This impacts an unknown function of the component XML Data Handler. Such manipulation leads to xml external entity reference. This vulnerability is uniquely identified as CVE-2018-1000009. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Checkstyle Plugin up to 3.49 on Jenkins (Jenkins Plugin) and classified as critical. Affected by this issue is some unknown functionality of the component XML Data Handler. The manipulation with an unknown input leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Jenkins Checkstyle Plugin 3.49 and earlier processes XML external entities in files it parses as part of the build process, allowing attackers with user permissions in Jenkins to extract secrets from the Jenkins master, perform server-side request forgery, or denial-of-service attacks.

The bug was discovered 01/22/2018. The weakness was disclosed 01/23/2018 (Website). The advisory is shared for download at jenkins.io. This vulnerability is handled as CVE-2018-1000009 since 01/23/2018. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-112351, VDB-112353, VDB-112354 and VDB-112355 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Jenkins Plugin

Name

• Checkstyle Plugin

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33
• 3.34
• 3.35
• 3.36
• 3.37
• 3.38
• 3.39
• 3.40
• 3.41
• 3.42
• 3.43
• 3.44
• 3.45
• 3.46
• 3.47
• 3.48
• 3.49

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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