Advisory Details

November 16th, 2021

Jenkins Performance XML External Entity Processing Information Disclosure Vulnerability

CVE ID	CVE-2021-21701
CVSS SCORE	6.5, AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS	Jenkins
AFFECTED PRODUCTS	Performance
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on affected installations of Jenkins Performance. Authentication is required to exploit this vulnerability. The specific flaw exists within the TaurusParser class. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the service account.
ADDITIONAL DETAILS	Jenkins has issued an update to correct this vulnerability. More details can be found at: https://www.jenkins.io/security/advisory/2021-11-12/#SECURITY-2394
DISCLOSURE TIMELINE	2021-06-14 - Vulnerability reported to vendor 2021-11-16 - Coordinated public release of advisory
CREDIT	Adith Sudhakar

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