CVE-2021-32825
low-risk
Published 2021-08-16
bblfshd is an open source self-hosted server for source code parsing. In bblfshd before commit 4265465b9b6fb5663c30ee43806126012066aad4 there is a "zipslip" vulnerability. The unsafe handling of symbolic links in an unpacking routine may enable attackers to read and/or write to arbitrary locations outside the designated target folder. This issue may lead to arbitrary file write (with same permissions as the program running the unpack operation) if the attacker can control the archive file. Additionally, if the attacker has read access to the unpacked files, he may be able to read arbitrary system files the parent process has permissions to read. For more details including a PoC see the referenced GHSL-2020-258.
Do I need to act?
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0.50% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
2
CVSS 2.7/10
Low
LOCAL
/ HIGH complexity
Affected Products (1)
Bblfshd
Affected Vendors
References (6)
14
/ 100
low-risk
Severity
7/34 · Low
Exploitability
2/34 · Minimal
Exposure
5/34 · Minimal