Explain CVE-2009-1338
The kill_something_info function in kernel/signal.c in the Linux kernel before 2.6.28 does not consider PID namespaces when processing signals directed to PID -1, which allows local users to bypass the intended namespace isolation, and send arbitrary signals to all processes in all namespaces, via a kill command.
Affected Products: n/a
References: [{'tags': ['x_refsource_CONFIRM'], 'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d25141a818383b3c3b09f065698c544a7a0ec6e7'}, {'name': '35656', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35656'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28'}, {'name': '20090516 rPSA-2009-0084-1 kernel', 'tags': ['mailing-list', 'x_refsource_BUGTRAQ'], 'url': 'http://www.securityfocus.com/archive/1/503610/100/0/threaded'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=496031'}, {'name': 'kernel-killsomethinginfo-security-bypass(50386)', 'tags': ['vdb-entry', 'x_refsource_XF'], 'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/50386'}, {'name': "[oss-security] 20090417 Re: CVE request: kernel: 'kill sig -1' must only apply to caller's PID namespace", 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://www.openwall.com/lists/oss-security/2009/04/17/4'}, {'name': '35120', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35120'}, {'name': 'USN-793-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/usn-793-1'}, {'name': 'RHSA-2009:1081', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'http://www.redhat.com/support/errata/RHSA-2009-1081.html'}, {'name': '34981', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/34981'}, {'name': 'DSA-1800', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'http://www.debian.org/security/2009/dsa-1800'}, {'name': '[linux-kernel] 20080723 Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://lkml.org/lkml/2008/7/23/148'}, {'name': '35343', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35343'}, {'name': "[oss-security] 20090421 Re: CVE request: kernel: 'kill sig -1' must only apply to caller's PID namespace", 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://www.openwall.com/lists/oss-security/2009/04/21/1'}, {'name': 'DSA-1787', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'http://www.debian.org/security/2009/dsa-1787'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://wiki.rpath.com/Advisories:rPSA-2009-0084'}, {'name': "[oss-security] 20090416 CVE request: kernel: 'kill sig -1' must only apply to caller's PID namespace", 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://www.openwall.com/lists/oss-security/2009/04/16/2'}, {'name': '35121', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35121'}]
CVE State: PUBLISHED