OpenLiteSpeed before 1.9.3 contains a local privilege escalation vulnerability in admin/misc/lsup.sh that runs unverified update packages from a nobody-writable directory as root. Attackers controlling the nobody web process can replace the package in /usr/local/lsws/autoupdate/ before extraction, so its install.sh runs as root on the next update.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/litespeedtech/openlitespeed/blob/v1.9.2/dist/admin/misc/lsup…
disclosure@vulncheck.com
https://github.com/litespeedtech/openlitespeed/commit/468523ce84388cea9ba6633c2…
disclosure@vulncheck.com
https://openlitespeed.org/release-log/version-1-9-x/
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openlitespeed-before-1.9.3-local-privilege…
disclosure@vulncheck.com