rhsa-2014_0557
Vulnerability from csaf_redhat
Published
2014-05-27 16:25
Modified
2024-11-22 08:19
Summary
Red Hat Security Advisory: kernel-rt security update

Notes

Topic
Updated kernel-rt packages that fix multiple security issues are now available for Red Hat Enterprise MRG 2.5. The Red Hat Security Response Team has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. * A race condition leading to a use-after-free flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled the addition of fragments to the LRU (Last-Recently Used) list under certain conditions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system by sending a large amount of specially crafted fragmented packets to that system. (CVE-2014-0100, Important) * A race condition flaw, leading to heap-based buffer overflows, was found in the way the Linux kernel's N_TTY line discipline (LDISC) implementation handled concurrent processing of echo output and TTY write operations originating from user space when the underlying TTY driver was PTY. An unprivileged, local user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-0196, Important) * 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. * A use-after-free flaw was found in the way the ping_init_sock() function of the Linux kernel handled the group_info reference counter. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-2851, Important) * It was found that a remote attacker could use a race condition flaw in the ath_tx_aggr_sleep() function to crash the system by creating large network traffic on the system's Atheros 9k wireless network adapter. (CVE-2014-2672, Moderate) * A NULL pointer dereference flaw was found in the rds_iw_laddr_check() function in the Linux kernel's implementation of Reliable Datagram Sockets (RDS). A local, unprivileged user could use this flaw to crash the system. (CVE-2014-2678, Moderate) * A race condition flaw was found in the way the Linux kernel's mac80211 subsystem implementation handled synchronization between TX and STA wake-up code paths. A remote attacker could use this flaw to crash the system. (CVE-2014-2706, Moderate) * It was found that the try_to_unmap_cluster() function in the Linux kernel's Memory Managment subsystem did not properly handle page locking in certain cases, which could potentially trigger the BUG_ON() macro in the mlock_vma_page() function. A local, unprivileged user could use this flaw to crash the system. (CVE-2014-3122, Moderate) Red Hat would like to thank Matthew Daley for reporting CVE-2014-1737 and CVE-2014-1738. The CVE-2014-0100 issue was discovered by Nikolay Aleksandrov of Red Hat. Users are advised to upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.10.33-rt32.34 and correct these issues. The system must be rebooted for this update to take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.



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        "text": "The kernel-rt packages contain the Linux kernel, the core of any Linux\noperating system.\n\n* A race condition leading to a use-after-free flaw was found in the way\nthe Linux kernel\u0027s TCP/IP protocol suite implementation handled the\naddition of fragments to the LRU (Last-Recently Used) list under certain\nconditions. A remote attacker could use this flaw to crash the system or,\npotentially, escalate their privileges on the system by sending a large\namount of specially crafted fragmented packets to that system.\n(CVE-2014-0100, Important)\n\n* A race condition flaw, leading to heap-based buffer overflows, was found\nin the way the Linux kernel\u0027s N_TTY line discipline (LDISC) implementation\nhandled concurrent processing of echo output and TTY write operations\noriginating from user space when the underlying TTY driver was PTY.\nAn unprivileged, local user could use this flaw to crash the system or,\npotentially, escalate their privileges on the system. (CVE-2014-0196,\nImportant)\n\n* A flaw was found in the way the Linux kernel\u0027s floppy driver handled user\nspace provided data in certain error code paths while processing FDRAWCMD\nIOCTL commands. A local user with write access to /dev/fdX could use this\nflaw to free (using the kfree() function) arbitrary kernel memory.\n(CVE-2014-1737, Important)\n\n* It was found that the Linux kernel\u0027s floppy driver leaked internal kernel\nmemory addresses to user space during the processing of the FDRAWCMD IOCTL\ncommand. A local user with write access to /dev/fdX could use this flaw to\nobtain information about the kernel heap arrangement. (CVE-2014-1738, Low)\n\nNote: A local user with write access to /dev/fdX could use these two flaws\n(CVE-2014-1737 in combination with CVE-2014-1738) to escalate their\nprivileges on the system.\n\n* A use-after-free flaw was found in the way the ping_init_sock() function\nof the Linux kernel handled the group_info reference counter. A local,\nunprivileged user could use this flaw to crash the system or, potentially,\nescalate their privileges on the system. (CVE-2014-2851, Important)\n\n* It was found that a remote attacker could use a race condition flaw in\nthe ath_tx_aggr_sleep() function to crash the system by creating large\nnetwork traffic on the system\u0027s Atheros 9k wireless network adapter.\n(CVE-2014-2672, Moderate)\n\n* A NULL pointer dereference flaw was found in the rds_iw_laddr_check()\nfunction in the Linux kernel\u0027s implementation of Reliable Datagram Sockets\n(RDS). A local, unprivileged user could use this flaw to crash the system.\n(CVE-2014-2678, Moderate)\n\n* A race condition flaw was found in the way the Linux kernel\u0027s mac80211\nsubsystem implementation handled synchronization between TX and STA wake-up\ncode paths. A remote attacker could use this flaw to crash the system.\n(CVE-2014-2706, Moderate)\n\n* It was found that the try_to_unmap_cluster() function in the Linux\nkernel\u0027s Memory Managment subsystem did not properly handle page locking in\ncertain cases, which could potentially trigger the BUG_ON() macro in the\nmlock_vma_page() function. A local, unprivileged user could use this flaw\nto crash the system. (CVE-2014-3122, Moderate)\n\nRed Hat would like to thank Matthew Daley for reporting CVE-2014-1737 and\nCVE-2014-1738. The CVE-2014-0100 issue was discovered by Nikolay\nAleksandrov of Red Hat.\n\nUsers are advised to upgrade to these updated packages, which upgrade the\nkernel-rt kernel to version kernel-rt-3.10.33-rt32.34 and correct these\nissues. The system must be rebooted for this update to take effect.",
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      "title": "kernel: block: floppy: privilege escalation via FDRAWCMD floppy ioctl command"
    },
    {
      "cve": "CVE-2014-2672",
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          "title": "Vulnerability description"
        },
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            "6Server-MRG-Realtime-2:kernel-rt-devel-0:3.10.33-rt32.34.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-0:3.10.33-rt32.34.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.10.33-rt32.34.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-0:3.10.33-rt32.34.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.10.33-rt32.34.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-devel-0:3.10.33-rt32.34.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.10.33-rt32.34.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.10.33-rt32.34.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.10.33-rt32.34.el6rt.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Kernel: mm: try_to_unmap_cluster() should lock_page() before mlocking"
    }
  ]
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.