CVE-2017-1000391: Improper Input Validation

January 26, 2018 (updated May 8, 2019)

Jenkins stores metadata related to people, which encompasses actual user accounts, as well as users appearing in SCM, in directories corresponding to the user ID on disk. These directories used the user ID for their name without additional escaping, potentially resulting in problems like overwriting of unrelated configuration files.

References

www.securityfocus.com/bid/101773
jenkins.io/security/advisory/2017-11-08/
nvd.nist.gov/vuln/detail/CVE-2017-1000391

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