What’s Vulnerable › Vulnerabilities

CVE-2011-1011

• Severity: medium (CVSS 6.9 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-02-24 · updated 2026-06-16
• Weakness: CWE-264

Description

The seunshare_mount function in sandbox/seunshare.c in seunshare in certain Red Hat packages of policycoreutils 2.0.83 and earlier in Red Hat Enterprise Linux (RHEL) 6 and earlier, and Fedora 14 and earlier, mounts a new directory on top of /tmp without assigning root ownership and the sticky bit to this new directory, which allows local users to replace or delete arbitrary /tmp files, and consequently cause a denial of service or possibly gain privileges, by running a setuid application that relies on /tmp, as demonstrated by the ksu application.

Affected products

• Red Hat Enterprise Linux: 3, 4, 5, 6.0
• RedHat Fedora: 6, 7, 8, 9, 10, 12 (+2)
• RedHat Policycoreutils: through 2.0.83; 1.0, 1.1, 1.2, 1.4, 1.6, 1.8 (+251)

References

• http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0585.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056227.html
• http://openwall.com/lists/oss-security/2011/02/23/1
• http://openwall.com/lists/oss-security/2011/02/23/2
• http://pkgs.fedoraproject.org/gitweb/?p=policycoreutils.git%3Ba=blob%3Bf=policycoreutils-rhat.patch%3Bh=d4db5bc06027de23d12a4b3f18fa6f9b1517df27%3Bhb=HEAD#l2197
• http://secunia.com/advisories/43415
• http://secunia.com/advisories/43844
• http://secunia.com/advisories/44034
• http://www.redhat.com/support/errata/RHSA-2011-0414.html
• http://www.securityfocus.com/bid/46510
• http://www.securitytracker.com/id?1025291
• http://www.vupen.com/english/advisories/2011/0701

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