Pointer Overflow in ZeroMQ Library Leading to Code Execution
CVE-2019-6250

8.8HIGH

Key Information:

Vendor

ZeroMQ

Status
LibzMQ
Vendor
CVE Published:
13 January 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 28%

What is CVE-2019-6250?

A pointer overflow vulnerability exists in the ZeroMQ library (libzmq) that can allow an authenticated attacker to execute arbitrary code. The flaw arises from an integer overflow in the v2_decoder.cpp component, specifically within the zmq::v2_decoder_t::size_ready function. This vulnerability enables an attacker to overwrite memory beyond a buffer's boundaries, leveraging the memory layout to inject OS commands into contiguous data structures. Due to its nature, a typical buffer overflow exploitation method is not required, posing a significant risk for those using the affected versions of ZeroMQ.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

cve-2019-6250-lab
Created by dinosn

References

https://www.debian.org/security/2019/dsa-4368
vendor-advisoryx_refsource_DEBIAN
https://github.com/zeromq/libzmq/issues/3351
x_refsource_CONFIRM
https://github.com/zeromq/libzmq/releases/tag/v4.3.1
x_refsource_CONFIRM

EPSS Score

28% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.