CVE Vulnerability

CVE-2021-20235

There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality.

6.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1921983 Issue Tracking Patch
https://github.com/zeromq/libzmq/security/advisories/GHSA-fc3w-qxf5-7hp6 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:zeromq:libzmq:*:*:*:*:*:*:*:*
Information

Published : 2021-04-01 02:15

Updated : 2022-08-05 05:41

NVD link : CVE-2021-20235

Mitre link : CVE-2021-20235

Products Affected
No products.
CWE
CWE-787