GSD-2018-8897

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
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.
Aliases
Aliases
CVE-2018-8897
To clipboard 

{
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    "alias": "CVE-2018-8897",
    "description": "A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer\u0027s 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 \u003c 3, the debug exception is delivered after the transfer to CPL \u003c 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.",
    "id": "GSD-2018-8897",
    "references": [
      "https://www.suse.com/security/cve/CVE-2018-8897.html",
      "https://www.debian.org/security/2018/dsa-4201",
      "https://www.debian.org/security/2018/dsa-4196",
      "https://access.redhat.com/errata/RHSA-2018:1711",
      "https://access.redhat.com/errata/RHSA-2018:1710",
      "https://access.redhat.com/errata/RHSA-2018:1524",
      "https://access.redhat.com/errata/RHSA-2018:1355",
      "https://access.redhat.com/errata/RHSA-2018:1354",
      "https://access.redhat.com/errata/RHSA-2018:1353",
      "https://access.redhat.com/errata/RHSA-2018:1352",
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      "https://access.redhat.com/errata/RHSA-2018:1346",
      "https://access.redhat.com/errata/RHSA-2018:1345",
      "https://access.redhat.com/errata/RHSA-2018:1319",
      "https://access.redhat.com/errata/RHSA-2018:1318",
      "https://ubuntu.com/security/CVE-2018-8897",
      "https://advisories.mageia.org/CVE-2018-8897.html",
      "https://security.archlinux.org/CVE-2018-8897",
      "https://alas.aws.amazon.com/cve/html/CVE-2018-8897.html",
      "https://linux.oracle.com/cve/CVE-2018-8897.html",
      "https://packetstormsecurity.com/files/cve/CVE-2018-8897"
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              "value": "A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer\u0027s 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 \u003c 3, the debug exception is delivered after the transfer to CPL \u003c 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-362"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://xenbits.xen.org/xsa/advisory-260.html",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://xenbits.xen.org/xsa/advisory-260.html"
            },
            {
              "name": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:06.debugreg.asc",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:06.debugreg.asc"
            },
            {
              "name": "https://github.com/torvalds/linux/commit/d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/torvalds/linux/commit/d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1567074",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
                "Third Party Advisory"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1567074"
            },
            {
              "name": "http://openwall.com/lists/oss-security/2018/05/08/1",
              "refsource": "MISC",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://openwall.com/lists/oss-security/2018/05/08/1"
            },
            {
              "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9"
            },
            {
              "name": "https://svnweb.freebsd.org/base?view=revision\u0026revision=333368",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://svnweb.freebsd.org/base?view=revision\u0026revision=333368"
            },
            {
              "name": "https://support.apple.com/HT208742",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://support.apple.com/HT208742"
            },
            {
              "name": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8897",
              "refsource": "CONFIRM",
              "tags": [
                "Patch",
                "Third Party Advisory",
                "Vendor Advisory"
              ],
              "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8897"
            },
            {
              "name": "http://openwall.com/lists/oss-security/2018/05/08/4",
              "refsource": "MISC",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://openwall.com/lists/oss-security/2018/05/08/4"
            },
            {
              "name": "https://www.triplefault.io/2018/05/spurious-db-exceptions-with-pop-ss.html",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.triplefault.io/2018/05/spurious-db-exceptions-with-pop-ss.html"
            },
            {
              "name": "https://www.synology.com/support/security/Synology_SA_18_21",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.synology.com/support/security/Synology_SA_18_21"
            },
            {
              "name": "USN-3641-2",
              "refsource": "UBUNTU",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://usn.ubuntu.com/3641-2/"
            },
            {
              "name": "https://support.citrix.com/article/CTX234679",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://support.citrix.com/article/CTX234679"
            },
            {
              "name": "https://patchwork.kernel.org/patch/10386677/",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://patchwork.kernel.org/patch/10386677/"
            },
            {
              "name": "RHSA-2018:1355",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1355"
            },
            {
              "name": "RHSA-2018:1354",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1354"
            },
            {
              "name": "RHSA-2018:1353",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1353"
            },
            {
              "name": "RHSA-2018:1352",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1352"
            },
            {
              "name": "RHSA-2018:1351",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1351"
            },
            {
              "name": "RHSA-2018:1350",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1350"
            },
            {
              "name": "RHSA-2018:1349",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1349"
            },
            {
              "name": "RHSA-2018:1348",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1348"
            },
            {
              "name": "RHSA-2018:1347",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1347"
            },
            {
              "name": "RHSA-2018:1346",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1346"
            },
            {
              "name": "RHSA-2018:1345",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1345"
            },
            {
              "name": "RHSA-2018:1319",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1319"
            },
            {
              "name": "RHSA-2018:1318",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1318"
            },
            {
              "name": "1040849",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1040849"
            },
            {
              "name": "104071",
              "refsource": "BID",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securityfocus.com/bid/104071"
            },
            {
              "name": "DSA-4196",
              "refsource": "DEBIAN",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.debian.org/security/2018/dsa-4196"
            },
            {
              "name": "1040882",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1040882"
            },
            {
              "name": "1040866",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1040866"
            },
            {
              "name": "1040861",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1040861"
            },
            {
              "name": "1040744",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1040744"
            },
            {
              "name": "RHSA-2018:1524",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:1524"
            },
            {
              "name": "DSA-4201",
              "refsource": "DEBIAN",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.debian.org/security/2018/dsa-4201"
            },
            {
              "name": "https://github.com/can1357/CVE-2018-8897/",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://github.com/can1357/CVE-2018-8897/"
            },
            {
              "name": "44697",
              "refsource": "EXPLOIT-DB",
              "tags": [
                "Exploit",
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "https://www.exploit-db.com/exploits/44697/"
            },
            {
              "name": "[debian-lts-announce] 20180525 [SECURITY] [DLA 1383-1] xen security update",
              "refsource": "MLIST",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://lists.debian.org/debian-lts-announce/2018/05/msg00015.html"
            },
            {
              "name": "USN-3641-1",
              "refsource": "UBUNTU",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://usn.ubuntu.com/3641-1/"
            },
            {
              "name": "[debian-lts-announce] 20180601 [SECURITY] [DLA 1392-1] linux security update",
              "refsource": "MLIST",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://lists.debian.org/debian-lts-announce/2018/06/msg00000.html"
            },
            {
              "name": "45024",
              "refsource": "EXPLOIT-DB",
              "tags": [],
              "url": "https://www.exploit-db.com/exploits/45024/"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20180927-0002/",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "https://security.netapp.com/advisory/ntap-20180927-0002/"
            },
            {
              "name": "[debian-lts-announce] 20181112 [SECURITY] [DLA 1577-1] xen security update",
              "refsource": "MLIST",
              "tags": [],
              "url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html"
            },
            {
              "name": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0"
            },
            {
              "name": "VU#631579",
              "refsource": "CERT-VN",
              "tags": [],
              "url": "https://www.kb.cert.org/vuls/id/631579"
            },
            {
              "name": "http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190921-01-debug-en",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190921-01-debug-en"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2019-10-03T00:03Z",
      "publishedDate": "2018-05-08T18:29Z"
    }
  }
}


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Tags
Taxonomy of the tags.




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.