RHSA-2016_1055

Vulnerability from csaf_redhat - Published: 2016-05-12 07:58 - Updated: 2024-11-14 19:02
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update
Severity
Important
Notes
Topic: An update for kernel-rt is now available for Red Hat Enterprise MRG 2.5. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. The following packages have been upgraded to a newer upstream version: kernel-rt (3.10.0-327.18.2). This version provides a number of bug fixes and enhancements, including: * [scsi] bnx2fc: Fix FCP RSP residual parsing and remove explicit logouts * [scsi] mpt3sas: Fix for Asynchronous completion of timedout IO and task abort of timedout IO * [scsi] scsi_error: should not get sense for timeout IO in scsi error handler * [scsi] Revert libiscsi: Reduce locking contention in fast path * [mm] madvise: fix MADV_WILLNEED on shmem swapouts * [cpufreq] intel_pstate: decrease number of "HWP enabled" messages and enable HWP per CPU * [kernel] sched: Robustify topology setup * [kernel] sched/fair: Disable tg load_avg/runnable_avg update for root_task_group * [kernel] sched/fair: Move hot load_avg/runnable_avg into separate cacheline * [ib] mlx5: Fix RC transport send queue overhead computation * [fs] nfsd: fix clp->cl_revoked list deletion causing softlock in nfsd * [fs] ceph: multiple updates (BZ#1320168) Security Fix(es): * A flaw was found in the way the Linux kernel's ASN.1 DER decoder processed certain certificate files with tags of indefinite length. A local, unprivileged user could use a specially crafted X.509 certificate DER file to crash the system or, potentially, escalate their privileges on the system. (CVE-2016-0758, Important) Red Hat would like to thank Philip Pettersson of Samsung for reporting this issue. Bug Fix(es): * The hotplug lock and the console semaphore could be acquired in an incorrect order, which could previously lead to a deadlock causing the system console to freeze. The underlying code has been adjusted to acquire the locks in the correct order, resolving the bug with the console. (BZ#1267425)
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.
CVE-2016-0758

A flaw was found in the way the Linux kernel's ASN.1 DER decoder processed certain certificate files with tags of indefinite length. A local, unprivileged user could use a specially crafted X.509 certificate DER file to crash the system or, potentially, escalate their privileges on the system.

7.2 ()
AV:L/AC:L/Au:N/C:C/I:C/A:C
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. https://access.redhat.com/errata/RHSA-2016:1055
References
Acknowledgments
Samsung Philip Pettersson
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Philip Pettersson"
          ],
          "organization": "Samsung"
        }
      ],
      "cve": "CVE-2016-0758",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "discovery_date": "2016-01-20T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1300257"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the way the Linux kernel\u0027s ASN.1 DER decoder processed certain certificate files with tags of indefinite length. A local, unprivileged user could use a specially crafted X.509 certificate DER file to crash the system or, potentially, escalate their privileges on the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: tags with indefinite length can corrupt pointers in asn1_find_indefinite_length()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6.\n\nThis issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2016-0758"
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1300257"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2016-0758",
          "url": "https://www.cve.org/CVERecord?id=CVE-2016-0758"
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2016-0758",
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          "date": "2016-05-12T07:58:56+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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            "baseScore": 7.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: tags with indefinite length can corrupt pointers in asn1_find_indefinite_length()"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.