The get_instantiation_keyring function in security/keys/keyctl.c in the KEYS subsystem in the Linux kernel before 2.6.32-rc5 does not properly maintain the reference count of a keyring, which allows local users to gain privileges or cause a denial of service (OOPS) via vectors involving calls to this function without specifying a keyring by ID, as demonstrated by a series of keyctl request2 and keyctl list commands.

The Linux kernel for openSUSE 11.2 was updated to 2.6.31.8 to fix the following bugs and security issues :

  - A file overwrite issue on the ext4 filesystem could be     used by local attackers that have write access to a     filesystem to change/overwrite files of other users,     including root. (CVE-2009-4131)

  - A remote denial of service by sending overly long     packets could be used by remote attackers to crash a     machine. (CVE-2009-1298)

  - The mac80211 subsystem in the Linux kernel allows remote     attackers to cause a denial of service (panic) via a     crafted Delete Block ACK (aka DELBA) packet, related to     an erroneous 'code shuffling patch.' (CVE-2009-4026)

  - Race condition in the mac80211 subsystem in the Linux     kernel allows remote attackers to cause a denial of     service (system crash) via a Delete Block ACK (aka     DELBA) packet that triggers a certain state change in     the absence of an aggregation session. (CVE-2009-4027)

  - The poll_mode_io file for the megaraid_sas driver in     the Linux kernel has world-writable permissions, which     allows local users to change the I/O mode of the driver     by modifying this file. (CVE-2009-3939)

  - The collect_rx_frame function in     drivers/isdn/hisax/hfc_usb.c in the Linux kernel allows     attackers to have an unspecified impact via a crafted     HDLC packet that arrives over ISDN and triggers a buffer     under-read. This requires the attacker to access the     machine on ISDN protocol level. (CVE-2009-4005)

  - Array index error in the gdth_read_event function in     drivers/scsi/gdth.c in the Linux kernel allows local     users to cause a denial of service or possibly gain     privileges via a negative event index in an IOCTL     request. (CVE-2009-3080)

  - The get_instantiation_keyring function in     security/keys/keyctl.c in the KEYS subsystem in the     Linux kernel does not properly maintain the reference     count of a keyring, which allows local users to gain     privileges or cause a denial of service (OOPS) via     vectors involving calls to this function without     specifying a keyring by ID, as demonstrated by a series     of keyctl request2 and keyctl list commands.
    (CVE-2009-3624)

  - The fuse_direct_io function in fs/fuse/file.c in the     fuse subsystem in the Linux kernel might allow attackers     to cause a denial of service (invalid pointer     dereference and OOPS) via vectors possibly related to a     memory-consumption attack. (CVE-2009-4021)

  - Multiple race conditions in fs/pipe.c in the Linux     kernel allow local users to cause a denial of service     (NULL pointer dereference and system crash) or gain     privileges by attempting to open an anonymous pipe via a     /proc/*/fd/ pathname. As openSUSE 11.2 by default sets     mmap_min_addr protection, this issue will just Oops the     kernel and not be able to execute code. (CVE-2009-3547)

  - net/unix/af_unix.c in the Linux kernel allows local     users to cause a denial of service (system hang) by     creating an abstract-namespace AF_UNIX listening socket,     performing a shutdown operation on this socket, and then     performing a series of connect operations to this     socket. (CVE-2009-3621)

  - drivers/firewire/ohci.c in the Linux kernel when     packet-per-buffer mode is used, allows local users to     cause a denial of service (NULL pointer dereference and     system crash) or possibly have unknown other impact via     an unspecified ioctl associated with receiving an ISO     packet that contains zero in the payload-length field.
    (CVE-2009-4138)

  - The ext4_decode_error function in fs/ext4/super.c in     the ext4 filesystem in the Linux kernel allows     user-assisted remote attackers to cause a denial of     service (NULL pointer dereference), and possibly have     unspecified other impact, via a crafted read-only     filesystem that lacks a journal. (CVE-2009-4308)

  - The ext4_fill_flex_info function in fs/ext4/super.c in     the Linux kernel allows user-assisted remote attackers     to cause a denial of service (divide-by-zero error and     panic) via a malformed ext4 filesystem containing a     super block with a large FLEX_BG group size (aka     s_log_groups_per_flex value). (CVE-2009-4307)

  - Unspecified vulnerability in the EXT4_IOC_MOVE_EXT (aka     move extents) ioctl implementation in the ext4     filesystem in the Linux kernel allows local users to     cause a denial of service (filesystem corruption) via     unknown vectors, a different vulnerability than     CVE-2009-4131. (CVE-2009-4306)

  - The EXT4_IOC_MOVE_EXT (aka move extents) ioctl     implementation in the ext4 filesystem in the Linux     kernel allows local users to overwrite arbitrary files     via a crafted request, related to insufficient checks     for file permissions. This can lead to privilege     escalations. (CVE-2009-4131)

  - The rt2870 and rt2860 drivers were refreshed to the     level they are in the Linux 2.6.32 kernel, bringing new     device support and new functionality.

It was discovered that the AX.25 network subsystem did not correctly check integer signedness in certain setsockopt calls. A local attacker could exploit this to crash the system, leading to a denial of service. Ubuntu 9.10 was not affected. (CVE-2009-2909)

Jan Beulich discovered that the kernel could leak register contents to 32-bit processes that were switched to 64-bit mode. A local attacker could run a specially crafted binary to read register values from an earlier process, leading to a loss of privacy. (CVE-2009-2910)

Dave Jones discovered that the gdth SCSI driver did not correctly validate array indexes in certain ioctl calls. A local attacker could exploit this to crash the system or gain elevated privileges.
(CVE-2009-3080)

Eric Dumazet and Jiri Pirko discovered that the TC and CLS subsystems would leak kernel memory via uninitialized structure members. A local attacker could exploit this to read several bytes of kernel memory, leading to a loss of privacy. (CVE-2009-3228, CVE-2009-3612)

Earl Chew discovered race conditions in pipe handling. A local attacker could exploit anonymous pipes via /proc/*/fd/ and crash the system or gain root privileges. (CVE-2009-3547)

Dave Jones and Francois Romieu discovered that the r8169 network driver could be made to leak kernel memory. A remote attacker could send a large number of jumbo frames until the system memory was exhausted, leading to a denial of service. Ubuntu 9.10 was not affected. (CVE-2009-3613).

Ben Hutchings discovered that the ATI Rage 128 video driver did not correctly validate initialization states. A local attacker could make specially crafted ioctl calls to crash the system or gain root privileges. (CVE-2009-3620)

Tomoki Sekiyama discovered that Unix sockets did not correctly verify namespaces. A local attacker could exploit this to cause a system hang, leading to a denial of service. (CVE-2009-3621)

J. Bruce Fields discovered that NFSv4 did not correctly use the credential cache. A local attacker using a mount with AUTH_NULL authentication could exploit this to crash the system or gain root privileges. Only Ubuntu 9.10 was affected. (CVE-2009-3623)

Alexander Zangerl discovered that the kernel keyring did not correctly reference count. A local attacker could issue a series of specially crafted keyring calls to crash the system or gain root privileges.
Only Ubuntu 9.10 was affected. (CVE-2009-3624)

David Wagner discovered that KVM did not correctly bounds-check CPUID entries. A local attacker could exploit this to crash the system or possibly gain elevated privileges. Ubuntu 6.06 and 9.10 were not affected. (CVE-2009-3638)

Avi Kivity discovered that KVM did not correctly check privileges when accessing debug registers. A local attacker could exploit this to crash a host system from within a guest system, leading to a denial of service. Ubuntu 6.06 and 9.10 were not affected. (CVE-2009-3722)

Philip Reisner discovered that the connector layer for uvesafb, pohmelfs, dst, and dm did not correctly check capabilties. A local attacker could exploit this to crash the system or gain elevated privileges. Ubuntu 6.06 was not affected. (CVE-2009-3725)

Trond Myklebust discovered that NFSv4 clients did not robustly verify attributes. A malicious remote NFSv4 server could exploit this to crash a client or gain root privileges. Ubuntu 9.10 was not affected.
(CVE-2009-3726)

Robin Getz discovered that NOMMU systems did not correctly validate NULL pointers in do_mmap_pgoff calls. A local attacker could attempt to allocate large amounts of memory to crash the system, leading to a denial of service. Only Ubuntu 6.06 and 9.10 were affected.
(CVE-2009-3888)

Joseph Malicki discovered that the MegaRAID SAS driver had world-writable option files. A local attacker could exploit these to disrupt the behavior of the controller, leading to a denial of service. (CVE-2009-3889, CVE-2009-3939)

Roel Kluin discovered that the Hisax ISDN driver did not correctly check the size of packets. A remote attacker could send specially crafted packets to cause a system crash, leading to a denial of service. (CVE-2009-4005)

Lennert Buytenhek discovered that certain 802.11 states were not handled correctly. A physically-proximate remote attacker could send specially crafted wireless traffic that would crash the system, leading to a denial of service. Only Ubuntu 9.10 was affected.
(CVE-2009-4026, CVE-2009-4027).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- Tue Nov 3 2009 Kyle McMartin <kyle at redhat.com>     2.6.30.9-96

    - fs/pipe.c: fix NULL pointer dereference       (CVE-2009-3547)

    - Sun Oct 25 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-95

    - Disable the stack protector on functions that don't       have onstack arrays.

    - Thu Oct 22 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-94

    - Fix overflow in KVM cpuid code. (CVE-2009-3638)

    - Thu Oct 22 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-93

    - Fix exploitable oops in keyring code (CVE-2009-3624)

    - Wed Oct 21 2009 Kyle McMartin <kyle at redhat.com>

    - shut-up-LOCK_TEST_WITH_RETURN.patch: sort out       #445331... or paper bag over it for now until the lock       warnings can be killed.

  - Mon Oct 19 2009 Kyle McMartin <kyle at redhat.com>

    -       af_unix-fix-deadlock-connecting-to-shutdown-socket.pat       ch: fix for rhbz#529626 local DoS. (CVE-2009-3621)

  - Sat Oct 17 2009 Chuck Ebbert <cebbert at redhat.com>     2.6.30.9-90

    - Fix null deref in r128 (F10#487546) (CVE-2009-3620)

    - Sat Oct 17 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-89

    - Keyboard and mouse fixes from 2.6.32 (#522126)

    - Sat Oct 17 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-88

    - Scheduler wakeup patch, fixes high latency on wakeup       (sched-update-the-clock-of-runqueue-select-task-rq-sel       ected.patch)

  - Fri Oct 16 2009 Chuck Ebbert <cebbert at redhat.com>     2.6.30.9-87

    - Fix uninitialized data leak in netlink (CVE-2009-3612)

    - Thu Oct 15 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-86

    - AX.25 security fix (CVE-2009-2909)

    - Thu Oct 15 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-85

    - Disable CONFIG_USB_STORAGE_CYPRESS_ATACB because it       causes failure to boot from USB disks using Cypress       bridges (#524998)

  - Tue Oct 13 2009 Chuck Ebbert <cebbert at redhat.com>     2.6.30.9-84

    - Copy libata drive detection fix from 2.6.31.4       (#524756)

    - Tue Oct 13 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-83

    - Networking fixes taken from 2.6.31-stable

    - Tue Oct 13 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-82

    - Fix boot hang with ACPI on some systems.

    - Mon Oct 12 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-81

    - Critical ftrace fixes:
      ftrace-use-module-notifier-for-function-tracer.patch       ftrace-check-for-failure-for-all-conversions.patch       tracing-correct-module-boundaries-for-ftrace_release.p       atch

  - Thu Oct 8 2009 Ben Skeggs <bskeggs at redhat.com>     2.6.30.9-80

    - ppc: compile nvidiafb as a module only,       nvidiafb+nouveau = bang! (rh#491308)

    - Wed Oct 7 2009 Dave Jones <davej at redhat.com>       2.6.30.9-78

    - Disable IRQSOFF tracer. (Adds unnecessary overhead       when unused)

    - Wed Oct 7 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-77

    - eCryptfs fixes taken from 2.6.31.2 (fixes       CVE-2009-2908)

    - Tue Oct 6 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-76

    - fix race in forcedeth network driver (#526546)

    - Tue Oct 6 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-75

    - x86: Don't leak 64-bit reg contents to 32-bit tasks.

    - Tue Oct 6 2009 Chuck Ebbert <cebbert at redhat.com>       2.6.30.9-74

[plus 194 lines in the Changelog]

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
43631	SuSE 11.2 Security Update: kernel (2009-12-18)	Nessus	SuSE Local Security Checks	high
43026	Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 / 9.10 : linux, linux-source-2.6.15 vulnerabilities (USN-864-1)	Nessus	Ubuntu Local Security Checks	high
42400	Fedora 11 : kernel-2.6.30.9-96.fc11 (2009-11032)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2009-3624

high

Tenable Plugins

high

high

high