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CVE-2019-6250

Published: 13 January 2019

A pointer overflow, with code execution, was discovered in ZeroMQ libzmq (aka 0MQ) 4.2.x and 4.3.x before 4.3.1. A v2_decoder.cpp zmq::v2_decoder_t::size_ready integer overflow allows an authenticated attacker to overwrite an arbitrary amount of bytes beyond the bounds of a buffer, which can be leveraged to run arbitrary code on the target system. The memory layout allows the attacker to inject OS commands into a data structure located immediately after the problematic buffer (i.e., it is not necessary to use a typical buffer-overflow exploitation technique that changes the flow of control).

Notes

AuthorNote
ebarretto
Vulnerable code introduce in 4.2.0

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
zeromq3
Launchpad, Ubuntu, Debian
upstream
Released (4.3.1-1)
precise Does not exist

trusty Not vulnerable
(code not present)
xenial Not vulnerable
(code not present)
bionic
Released (4.2.5-1ubuntu0.1)
cosmic
Released (4.2.5-2ubuntu0.1)

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H