CVE-2021-32825

 

Published at: - 16-08-2021 09:15

Last modified: - 02-07-2022 08:22

Total changes: - 4

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

 

Verification logic

 

Reference

• https://github.com/bblfsh/bblfshd/pull/341
• https://securitylab.github.com/advisories/GHSL-2020-258-zipslip-bblfshd/
• https://github.com/bblfsh/bblfshd/commit/4265465b9b6fb5663c30ee43806126012066aad4

 

Keywords

NVD

 

CVE-2021-32825

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures