csaf_redhat - rhsa-2017

rhsa-2017_1491

Vulnerability from csaf_redhat

Published

2017-06-19 18:59

Modified

2024-09-13 14:41

Summary

Red Hat Security Advisory: kernel security and bug fix update

Notes

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.2 Advanced Update Support. 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 packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult. (CVE-2017-1000364, Important) Red Hat would like to thank Qualys Research Labs for reporting this issue. Bug Fix(es): * Previously, a kernel panic occurred when the mcelog daemon executed a huge page memory offline. This update fixes the HugeTLB feature of the Linux kernel to check for the Page Table Entry (PTE) NULL pointer in the page_check_address() function. As a result, the kernel panic no longer occurs under the described circumstances. (BZ#1444342) * Previously, the kdump mechanism was trying to get the lock by the vmalloc_sync_all() function during a kernel panic. Consequently, a deadlock occurred, and the crashkernel did not boot. This update fixes the vmalloc_sync_all() function to avoid synchronizing the vmalloc area on the crashing CPU. As a result, the crashkernel parameter now boots as expected, and the kernel dump is collected successfully under the described circumstances. (BZ#1443494)

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": "A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult.",
          "title": "Vulnerability description"
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        {
          "category": "summary",
          "text": "kernel: heap/stack gap jumping via unbounded stack allocations",
          "title": "Vulnerability summary"
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          "category": "other",
          "text": "This is a kernel-side mitigation. For a related glibc mitigation please see https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-1000366 .",
          "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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          "names": [
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        {
          "category": "description",
          "text": "The Linux Kernel running on AMD64 systems will sometimes map the contents of PIE executable, the heap or ld.so to where the stack is mapped allowing attackers to more easily manipulate the stack. Linux Kernel version 4.11.5 is affected.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: Incorrectly mapped contents of PIE executable",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue was part of the stack guard fixes that was fixed along side the CVE-2017-1000364 flaw.  This issue has previously affected Red Hat Enterprise Linux 5,6,7 and MRG-2.  This issue is currently fixed in most versions of shipping products.",
          "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.",
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          "category": "vendor_fix",
          "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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            "integrityImpact": "LOW",
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      "title": "kernel: Incorrectly mapped contents of PIE executable"
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  ]
}

cve-2017-1000364

Vulnerability from cvelistv5

Published

2017-06-19 16:00

Modified

2024-08-05 22:00

Severity

Summary

An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be "jumped" over (the stack guard page is bypassed), this affects Linux Kernel versions 4.11.5 and earlier (the stackguard page was introduced in 2010).

References

URL	Tags
https://access.redhat.com/errata/RHSA-2017:1491	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2017-1000364	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:1486	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1489	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1490	vendor-advisory, x_refsource_REDHAT
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt	x_refsource_MISC
https://www.exploit-db.com/exploits/45625/	exploit, x_refsource_EXPLOIT-DB
https://access.redhat.com/errata/RHSA-2017:1482	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1647	vendor-advisory, x_refsource_REDHAT
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03800en_us	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:1616	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1712	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1483	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1487	vendor-advisory, x_refsource_REDHAT
http://www.securityfocus.com/bid/99130	vdb-entry, x_refsource_BID
https://www.suse.com/support/kb/doc/?id=7020973	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:1567	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1484	vendor-advisory, x_refsource_REDHAT
https://www.suse.com/security/cve/CVE-2017-1000364/	x_refsource_CONFIRM
http://www.debian.org/security/2017/dsa-3886	vendor-advisory, x_refsource_DEBIAN
http://www.securitytracker.com/id/1038724	vdb-entry, x_refsource_SECTRACK
https://kc.mcafee.com/corporate/index?page=content&id=SB10205	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:1485	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1488	vendor-advisory, x_refsource_REDHAT
https://kc.mcafee.com/corporate/index?page=content&id=SB10207	x_refsource_CONFIRM

Impacted products

Vendor	Product
n/a	n/a

Show details on NVD website

JSON

To clipboard

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cve-2017-1000379

Vulnerability from cvelistv5

Published

2017-06-19 16:00

Modified

2024-08-05 22:00

Severity

Summary

The Linux Kernel running on AMD64 systems will sometimes map the contents of PIE executable, the heap or ld.so to where the stack is mapped allowing attackers to more easily manipulate the stack. Linux Kernel version 4.11.5 is affected.

References

URL	Tags
https://access.redhat.com/errata/RHSA-2017:1491	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1486	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1489	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1490	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2017-1000379	x_refsource_CONFIRM
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt	x_refsource_MISC
https://access.redhat.com/errata/RHSA-2017:1482	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1647	vendor-advisory, x_refsource_REDHAT
http://www.securityfocus.com/bid/99284	vdb-entry, x_refsource_BID
https://www.exploit-db.com/exploits/42275/	exploit, x_refsource_EXPLOIT-DB
https://access.redhat.com/errata/RHSA-2017:1616	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1712	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1487	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1484	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1842	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1485	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:1488	vendor-advisory, x_refsource_REDHAT

Impacted products

Vendor	Product
n/a	n/a

Show details on NVD website

JSON

To clipboard

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Action not permitted

rhsa-2017_1491

Vulnerability from csaf_redhat

cve-2017-1000364

Vulnerability from cvelistv5

cve-2017-1000379

Vulnerability from cvelistv5

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