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Gentoo: 201310-17 Low Severity: Pmake Symlink Attack Advisory

gentoo
Calendar Grey October 28, 2013
Scroller Gentoo
Gentoo Security Advisory GLSA 201400-15 raises an alert regarding a medium severity vulnerability associated with improper handling of file permissions during the installation process.
pmake uses temporary files in an insecure manner, allowing for symlink attacks.

Summary

/usr/share/mk/bsd.lib.mk and /usr/share/mk/bsd.prog.mk create temporary files insecurely, with predictable names (/tmp/_depend[PID]), and without using $TMPDIR.

Topics%20covered

Topics Covered

security advisory gentoo symlink attack low severity temporary files pmake

Resolution

All pmake users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-devel/pmake-1.111.3.1"

References

[ 1 ] CVE-2011-1920 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-1920

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201310-17
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity
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Severity: Low
Title: pmake: Insecure temporary file usage
Date: October 28, 2013
Bugs: #367891
ID: 201310-17

Topics%20covered

Topics Covered

security advisory gentoo symlink attack low severity temporary files pmake

Synopsis

pmake uses temporary files in an insecure manner, allowing for symlink attacks.

Background

pmake is Debian's version of NetBSD's make, a tool to build programs in parallel.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-devel/pmake < 1.111.3.1 >= 1.111.3.1

Impact

===== The make include files allow local users to overwrite arbitrary files via a symlink attack.

Workaround

There is no known workaround at this time.