[ GLSA 202107-03 ] libqb

[GLSA]

Gentoo Linux Security Advisory

Title: libqb: Insecure temporary file (GLSA 202107-03)
Severity: high
Exploitable: local
Date: 2021-07-03
Bug(s): #699860
ID: 202107-03

Synopsis

An insecure temporary file usage has been reported in libqb
possibly allowing local code execution.


Background

libqb is a library with the primary purpose of providing
high-performance, reusable features for client-server architecture, such
as logging, tracing, inter-process communication (IPC), and polling.


Affected Packages

Package: sys-cluster/libqb
Vulnerable: < 1.0.5
Unaffected: >= 1.0.5
Architectures: All supported architectures


Description

It was discovered that libqb used predictable filenames (under /dev/shm
and /tmp) without O_EXCL.


Impact

A local attacker could perform symlink attacks to overwrite arbitrary
files with the privileges of the user running the application linked
against libqb.


Workaround

There is no known workaround at this time.

Resolution

All libqb users should upgrade to the latest version: