rubyzip before 3.4.0 Path Traversal in Zip::Entry#extract via Sibling-Directory Prefix
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.6%
exploitation probability
0.6%top 55% of all CVEs
observed exploitation
nono source reports it
rubyzip versions before 3.4.0 contain a path traversal vulnerability in Zip::Entry#extract that fails to properly validate extraction paths using prefix comparison without trailing separators. Attackers can craft archive entries with names like ../upload_backup/owned.sh to write files outside the intended extraction directory into sibling paths sharing the destination prefix.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
rubyzip · rubyzipReferences
https://github.com/geo-chen/oss/blob/main/rubyzip.mdhttps://github.com/rubyzip/rubyziphttps://github.com/rubyzip/rubyzip/blob/v3.3.1/lib/zip/entry.rbhttps://github.com/rubyzip/rubyzip/commit/17edfbf4423b83211b075acc23a7d8640da63449https://github.com/rubyzip/rubyzip/releases/tag/v3.4.0https://www.vulncheck.com/advisories/rubyzip-before-3.4.0-path-traversal-in-zip-entry-extract-via-sibling-directory-prefix