Vercel deepsec from 0.1.0 before 1.1.17 contains a link following vulnerability in extractTarballLocally that allows sandboxed code to write files outside the sandbox by planting links in result tarballs. Attackers controlling sandbox code, such as a prompt-injected coding agent, can plant symbolic or hard links in the host data directory to write arbitrary files on the orchestrator host.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/vercel-labs/deepsec
disclosure@vulncheck.com
https://github.com/vercel-labs/deepsec/commit/c5a4e4220ece72aee67c2ea21f4340e65…
disclosure@vulncheck.com
https://github.com/vercel-labs/deepsec/pull/46
disclosure@vulncheck.com
https://github.com/vercel-labs/deepsec/pull/47
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/vercel-deepsec-before-1.1.17-arbitrary-fil…
disclosure@vulncheck.com