github - ghsa-7589-4cgq-4p68

ghsa-7589-4cgq-4p68

Vulnerability from github

Published

2022-05-13 01:49

Modified

2022-05-13 01:49

Severity ?

6.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Details

An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.

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{
  "affected": [],
  "aliases": [
    "CVE-2018-12893"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-07-02T17:29:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.",
  "id": "GHSA-7589-4cgq-4p68",
  "modified": "2022-05-13T01:49:40Z",
  "published": "2022-05-13T01:49:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-12893"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1590979"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201810-06"
    },
    {
      "type": "WEB",
      "url": "https://support.citrix.com/article/CTX235748"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2018/dsa-4236"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2018/06/27/11"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/104572"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1041202"
    },
    {
      "type": "WEB",
      "url": "http://xenbits.xen.org/xsa/advisory-265.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2018-12893

Vulnerability from cvelistv5

Published

2018-07-02 17:00

Modified

2024-08-05 08:45

Severity ?

Summary

References

▼	URL	Tags
	http://www.openwall.com/lists/oss-security/2018/06/27/11	mailing-list, x_refsource_MLIST
	https://www.debian.org/security/2018/dsa-4236	vendor-advisory, x_refsource_DEBIAN
	https://support.citrix.com/article/CTX235748	x_refsource_CONFIRM
	https://security.gentoo.org/glsa/201810-06	vendor-advisory, x_refsource_GENTOO
	https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html	mailing-list, x_refsource_MLIST
	https://bugzilla.redhat.com/show_bug.cgi?id=1590979	x_refsource_CONFIRM
	http://xenbits.xen.org/xsa/advisory-265.html	x_refsource_CONFIRM
	http://www.securityfocus.com/bid/104572	vdb-entry, x_refsource_BID
	http://www.securitytracker.com/id/1041202	vdb-entry, x_refsource_SECTRACK

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

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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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