csaf_redhat - rhsa-2018

rhsa-2018_1349

Vulnerability from csaf_redhat

Published

2018-05-08 21:49

Modified

2024-11-15 03:04

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 6.4 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. [Updated 10 May 2018] The references to CVE-2017-5754 x86 (32-bit) mitigation were removed because Red Hat Enterprise Linux 6.4 Advanced Update Support does not include support for x86 32-bit architecture. Consequently, impact rating of this erratum was changed from Important to Moderate.

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * Kernel: error in exception handling leads to DoS (CVE-2018-8897) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting this issue. Bug Fix(es): * The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1554251)

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": "An update for kernel is now available for Red Hat Enterprise Linux 6.4 Advanced Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. 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.\n\n[Updated 10 May 2018]\n\nThe references to CVE-2017-5754 x86 (32-bit) mitigation were removed because Red Hat Enterprise Linux 6.4 Advanced Update Support does not include support for x86 32-bit architecture. Consequently, impact rating of this erratum was changed from Important to Moderate.",
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        "text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* Kernel: error in exception handling leads to DoS (CVE-2018-8897)\n\nFor more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.\n\nRed Hat would like to thank Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting this issue.\n\nBug Fix(es):\n\n* The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1554251)",
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          "title": "Vulnerability description"
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          "text": "Kernel: error in exception handling leads to DoS",
          "title": "Vulnerability summary"
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          "text": "This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2 may address this issue.",
          "title": "Statement"
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        {
          "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": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Kernel: error in exception handling leads to DoS"
    }
  ]
}

cve-2018-8897

Vulnerability from cvelistv5

Published

2018-05-08 18:00

Modified

2024-08-05 07:10

Severity ?

Summary

A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.

References

▼	URL	Tags
	https://github.com/torvalds/linux/commit/d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9	x_refsource_MISC
	http://openwall.com/lists/oss-security/2018/05/08/4	x_refsource_MISC
	http://www.securitytracker.com/id/1040849	vdb-entry, x_refsource_SECTRACK
	http://www.securityfocus.com/bid/104071	vdb-entry, x_refsource_BID
	https://access.redhat.com/errata/RHSA-2018:1350	vendor-advisory, x_refsource_REDHAT
	https://support.citrix.com/article/CTX234679	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2018:1347	vendor-advisory, x_refsource_REDHAT
	https://www.exploit-db.com/exploits/44697/	exploit, x_refsource_EXPLOIT-DB
	https://lists.debian.org/debian-lts-announce/2018/05/msg00015.html	mailing-list, x_refsource_MLIST
	http://www.securitytracker.com/id/1040866	vdb-entry, x_refsource_SECTRACK
	https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2018/06/msg00000.html	mailing-list, x_refsource_MLIST
	https://support.apple.com/HT208742	x_refsource_MISC
	https://access.redhat.com/errata/RHSA-2018:1346	vendor-advisory, x_refsource_REDHAT
	https://access.redhat.com/errata/RHSA-2018:1348	vendor-advisory, x_refsource_REDHAT
	https://access.redhat.com/errata/RHSA-2018:1354	vendor-advisory, x_refsource_REDHAT
	https://svnweb.freebsd.org/base?view=revision&revision=333368	x_refsource_MISC
	https://www.debian.org/security/2018/dsa-4196	vendor-advisory, x_refsource_DEBIAN
	https://www.freebsd.org/security/advisories/FreeBSD-SA-18:06.debugreg.asc	x_refsource_MISC
	http://www.securitytracker.com/id/1040744	vdb-entry, x_refsource_SECTRACK
	https://www.triplefault.io/2018/05/spurious-db-exceptions-with-pop-ss.html	x_refsource_MISC
	https://access.redhat.com/errata/RHSA-2018:1351	vendor-advisory, x_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=1567074	x_refsource_MISC
	https://xenbits.xen.org/xsa/advisory-260.html	x_refsource_MISC
	https://access.redhat.com/errata/RHSA-2018:1319	vendor-advisory, x_refsource_REDHAT
	https://www.debian.org/security/2018/dsa-4201	vendor-advisory, x_refsource_DEBIAN
	https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2018:1355	vendor-advisory, x_refsource_REDHAT
	https://security.netapp.com/advisory/ntap-20180927-0002/	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2018:1345	vendor-advisory, x_refsource_REDHAT
	https://www.exploit-db.com/exploits/45024/	exploit, x_refsource_EXPLOIT-DB
	https://access.redhat.com/errata/RHSA-2018:1349	vendor-advisory, x_refsource_REDHAT
	https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8897	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2018:1352	vendor-advisory, x_refsource_REDHAT
	https://access.redhat.com/errata/RHSA-2018:1318	vendor-advisory, x_refsource_REDHAT
	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9	x_refsource_MISC
	https://patchwork.kernel.org/patch/10386677/	x_refsource_MISC
	https://www.kb.cert.org/vuls/id/631579	third-party-advisory, x_refsource_CERT-VN
	https://github.com/can1357/CVE-2018-8897/	x_refsource_MISC
	https://access.redhat.com/errata/RHSA-2018:1524	vendor-advisory, x_refsource_REDHAT
	http://openwall.com/lists/oss-security/2018/05/08/1	x_refsource_MISC
	http://www.securitytracker.com/id/1040861	vdb-entry, x_refsource_SECTRACK
	https://access.redhat.com/errata/RHSA-2018:1353	vendor-advisory, x_refsource_REDHAT
	https://usn.ubuntu.com/3641-2/	vendor-advisory, x_refsource_UBUNTU
	https://www.synology.com/support/security/Synology_SA_18_21	x_refsource_CONFIRM
	http://www.securitytracker.com/id/1040882	vdb-entry, x_refsource_SECTRACK
	https://usn.ubuntu.com/3641-1/	vendor-advisory, x_refsource_UBUNTU
	http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190921-01-debug-en	x_refsource_CONFIRM

Impacted products

Vendor

Product

Version

▼

n/a

Version: n/a

Show details on NVD website

JSON

To clipboard

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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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