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[ GLSA 202107-03 ] libqb
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Joined: 12 May 2004
Posts: 2663

PostPosted: Sat Jul 03, 2021 4:26 am    Post subject: [ GLSA 202107-03 ] libqb Reply with quote

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


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


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


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


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


There is no known workaround at this time.


All libqb users should upgrade to the latest version:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=sys-cluster/libqb-1.0.5"


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