acpid.c in acpid before 2.0.9 does not properly handle a situation in which a process has connected to acpid.socket but is not reading any data, which allows local users to cause a denial of service (daemon hang) via a crafted application that performs a connect system call but no read system calls.

References

• https://nvd.nist.gov/vuln/detail/CVE-2011-1159
• https://bugzilla.redhat.com/show_bug.cgi?id=688698
• http://lists.fedoraproject.org/pipermail/package-announce/2011-May/059880.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060053.html
• http://secunia.com/advisories/42947
• http://secunia.com/advisories/44621
• http://www.openwall.com/lists/oss-security/2011/01/19/4
• http://www.openwall.com/lists/oss-security/2011/03/15/12
• http://www.openwall.com/lists/oss-security/2011/03/15/7
• http://www.securityfocus.com/bid/45915