CVE Vulnerability

CVE-2021-32825

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.

5.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

9.1 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/bblfsh/bblfshd/pull/341 Patch Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2020-258-zipslip-bblfshd/ Exploit Third Party Advisory
https://github.com/bblfsh/bblfshd/commit/4265465b9b6fb5663c30ee43806126012066aad4 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:bblfshd_project:bblfshd:*:*:*:*:*:*:*:*
Information

Published : 2021-08-16 07:15

Updated : 2022-07-02 06:22

NVD link : CVE-2021-32825

Mitre link : CVE-2021-32825

Products Affected
No products.
CWE
CWE-59