Date: Wed, 26 Oct 2011 09:26:36 -0600 From: Kurt Seifried <kseifried@...hat.com> To: oss-security@...ts.openwall.com Subject: Re: CVE Request -- kernel: sysctl: restrict write access to dmesg_restrict On 10/26/2011 09:16 AM, Petr Matousek wrote: > When dmesg_restrict is set to 1 CAP_SYS_ADMIN is needed to read the > kernel ring buffer. But a root user without CAP_SYS_ADMIN is able > to reset dmesg_restrict to 0. > > This is an issue when e.g. LXC (Linux Containers) are used and complete > user space is running without CAP_SYS_ADMIN. A unprivileged and jailed > root user can bypass the dmesg_restrict protection. > > Introduced by: > eaf06b241b091357e72b76863ba16e89610d31bd > > Fixed by: > bfdc0b497faa82a0ba2f9dddcf109231dd519fcc > > Thanks, Please use CVE-2011-4080 for this issue. -- -Kurt Seifried / Red Hat Security Response Team
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