Fixed bug GHSA-3qgc-jrrr-25jv (Bypass of CVE-2012-1823, Argument Injection in PHP-CGI). (CVE-2024-4577)
Commit 5b7c84066733c5dfb0e4016d939757b38de189e4 ('ipv4: correct IGMP behavior on v3 query during v2-compatibility mode') added yet another case for query parsing, which can result in maxdelay = 0. Substitute a value of 1, as in the usual v3 case.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=654876
code added in 2.6.36-rc8.
Upstream commit: http://git.kernel.org/linus/a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27
Acknowledgements:
Red Hat would like to thank Simon McVittie for reporting this issue.
A flaw was found in the way Linux kernel's floppy driver treated userspace provided data in certain error code path while processing FDRAWCMD ioctl command. An local user with write access to /dev/fdX could use this flaw to kfree() arbitrary data. (CVE-2014-1737)
It was found that Linux kernel's floppy driver leaked internal kernel memory addresses to userspace during processing of FDRAWCMD ioctl command. An local user with write access to /dev/fdX could use this flaw to get information about kernel heap arrangment. (CVE-2014-1738)
An local user with write access to /dev/fdX could use these two flaws (CVE-2014-1737 in combination with CVE-2014-1738) to escalate their privileges on the system.
Acknowledgements:
Red Hat would like to thank Matthew Daley for reporting these issues.
In ibuverbspollcq() code there is a potential integer overflow if userspace passes in a large cmd.ne. The calls to kmalloc() would allocate smaller buffers than intended, leading to memory corruption. There iss also an information leak if resp wasn't all used. Unprivileged userspace may call this function, although only if an RDMA device that uses this function is present.
Fix this by copying CQ entries one at a time, which avoids the allocation entirely, and also by moving this copying into a function that makes sure to initialize all memory copied to userspace.
Upstream commit: http://git.kernel.org/linus/7182afea8d1afd432a17c18162cc3fd441d0da93
A flaw was found in the way the Linux kernel's floppy driver handled user space provided data in certain error code paths while processing FDRAWCMD IOCTL commands. A local user with write access to /dev/fdX could use this flaw to free (using the kfree() function) arbitrary kernel memory. (CVE-2014-1737, Important) It was found that the Linux kernel's floppy driver leaked internal kernel memory addresses to user space during the processing of the FDRAWCMD IOCTL command. A local user with write access to /dev/fdX could use this flaw to obtain information about the kernel heap arrangement. (CVE-2014-1738, Low) Note: A local user with write access to /dev/fdX could use these two flaws (CVE-2014-1737 in combination with CVE-2014-1738) to escalate their privileges on the system.