MGASA-2015-0070

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MGASA-2015-0070

Summary: Updated kernel packages fix security vulnerabilities

Details: This kernel update is based on upstream -longterm 3.14.32 and fixes the following security issues: The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c (CVE-2014-8989). The batadv_frag_merge_packets function in net/batman-adv/fragmentation.c in the B.A.T.M.A.N. implementation in the Linux kernel through 3.18.1 uses an incorrect length field during a calculation of an amount of memory, which allows remote attackers to cause a denial of service (mesh-node system crash) via fragmented packets (CVE-2014-9428). Race condition in the key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 3.18.2 allows local users to cause a denial of service (memory corruption or panic) or possibly have unspecified other impact via keyctl commands that trigger access to a key structure member during garbage collection of a key (CVE-2014-9529). The parse_rock_ridge_inode_internal function in fs/isofs/rock.c in the Linux kernel before 3.18.2 does not validate a length value in the Extensions Reference (ER) System Use Field, which allows local users to obtain sensitive information from kernel memory via a crafted iso9660 image (CVE-2014-9584). The vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection mechanism by guessing a location at the end of a PMD (CVE-2014-9585). Linux Kernel 2.6.38 through 3.18 are affected by a flaw in the Crypto API that allows any local user to load any installed kernel module on systems where CONFIG_CRYPTO_USER_API=y by abusing the request_module() call (CVE-2013-7421, CVE-2014-9644). When hitting an sctp INIT collision case during the 4WHS with AUTH enabled, it can create a local denial of service by triggerinf a panic on server side (CVE-2015-1421). It was found that routing packets to too many different dsts/too fast can lead to a excessive resource consumption. A remote attacker can use this flaw to crash the system (CVE-2015-1465). For other fixes in this update, see the referenced changelogs.

References: https://advisories.mageia.org/MGASA-2015-0070.html, https://bugs.mageia.org/show_bug.cgi?id=15221, https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.28, https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.29, https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.30, https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.31, https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.32