certfr_avis - CERTFR-2020-AVI-711

CERTFR-2020-AVI-711

Vulnerability from certfr_avis - Published: - Updated:

De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur et une atteinte à la confidentialité des données.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

Vendor	Product	Description
SUSE	N/A	SUSE Linux Enterprise Module for Basesystem 15-SP2
SUSE	N/A	SUSE Linux Enterprise Module for Legacy Software 15-SP2
SUSE	N/A	SUSE Linux Enterprise High Availability 15-SP2
SUSE	N/A	SUSE Linux Enterprise Module for Development Tools 15-SP2
SUSE	N/A	SUSE Linux Enterprise Workstation Extension 15-SP2
SUSE	N/A	SUSE Linux Enterprise Module for Live Patching 15-SP2

References

Title

Publication Time

Tags

Bulletin de sécurité SUSE suse-su-20203122-1 du 4 novembre 2020

None

vendor-advisory

Show details on source website

JSON

To clipboard

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  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "SUSE Linux Enterprise Module for Basesystem 15-SP2",
      "product": {
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      "product": {
        "name": "N/A",
        "vendor": {
          "name": "SUSE",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": null,
  "content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
  "cves": [
    {
      "name": "CVE-2020-25285",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-25285"
    },
    {
      "name": "CVE-2020-16120",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-16120"
    },
    {
      "name": "CVE-2020-14351",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-14351"
    }
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  "reference": "CERTFR-2020-AVI-711",
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  "risks": [
    {
      "description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans le noyau Linux de\nSUSE. Elles permettent \u00e0 un attaquant de provoquer un probl\u00e8me de\ns\u00e9curit\u00e9 non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur et une atteinte \u00e0 la confidentialit\u00e9\ndes donn\u00e9es.\n",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans le noyau Linux de SUSE",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 SUSE suse-su-20203122-1 du 4 novembre 2020",
      "url": "https://www.suse.com/support/update/announcement/2020/suse-su-20203122-1/"
    }
  ]
}

CVE-2020-16120 (GCVE-0-2020-16120)

Vulnerability from cvelistv5 – Published: 2021-02-10 19:45 – Updated: 2024-09-16 18:49

Summary

Overlayfs did not properly perform permission checking when copying up files in an overlayfs and could be exploited from within a user namespace, if, for example, unprivileged user namespaces were allowed. It was possible to have a file not readable by an unprivileged user to be copied to a mountpoint controlled by the user, like a removable device. This was introduced in kernel version 4.19 by commit d1d04ef ("ovl: stack file ops"). This was fixed in kernel version 5.8 by commits 56230d9 ("ovl: verify permissions in ovl_path_open()"), 48bd024 ("ovl: switch to mounter creds in readdir") and 05acefb ("ovl: check permission to open real file"). Additionally, commits 130fdbc ("ovl: pass correct flags for opening real directory") and 292f902 ("ovl: call secutiry hook in ovl_real_ioctl()") in kernel 5.8 might also be desired or necessary. These additional commits introduced a regression in overlay mounts within user namespaces which prevented access to files with ownership outside of the user namespace. This regression was mitigated by subsequent commit b6650da ("ovl: do not fail because of O_NOATIMEi") in kernel 5.11.

Severity ?

5.1 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-266 - Incorrect Privilege Assignment

Assigner

canonical

References

URL

Tags

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	https://ubuntu.com/USN-4577-1	vendor-advisoryx_refsource_UBUNTU
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	https://launchpad.net/bugs/1894980	vendor-advisoryx_refsource_UBUNTU
	https://launchpad.net/bugs/1900141	vendor-advisoryx_refsource_UBUNTU
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	https://git.kernel.org/linus/b6650dab404c701d7fe0…	x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	Linux kernel	Linux kernel	Affected: 5.11-stable , < 5.11.0 (custom)

Credits

Giuseppe Scrivano

Show details on NVD website

JSON

To clipboard

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CVE-2020-25285 (GCVE-0-2020-25285)

Vulnerability from cvelistv5 – Published: 2020-09-13 17:28 – Updated: 2024-08-04 15:33

Summary

A race condition between hugetlb sysctl handlers in mm/hugetlb.c in the Linux kernel before 5.8.8 could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact, aka CID-17743798d812.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

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	https://twitter.com/grsecurity/status/13037498488…	x_refsource_MISC
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	https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
	https://security.netapp.com/advisory/ntap-2020100…	x_refsource_CONFIRM
	https://usn.ubuntu.com/4576-1/	vendor-advisoryx_refsource_UBUNTU
	https://usn.ubuntu.com/4579-1/	vendor-advisoryx_refsource_UBUNTU
	https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

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CVE-2020-14351 (GCVE-0-2020-14351)

Vulnerability from cvelistv5 – Published: 2020-12-03 16:43 – Updated: 2024-08-04 12:39

Summary

A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Severity ?

No CVSS data available.

CWE

CWE-416

Assigner

redhat

References

URL

Tags

	https://bugzilla.redhat.com/show_bug.cgi?id=1862849	x_refsource_MISC
	https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST

Impacted products

	Vendor	Product	Version
	n/a	kernel	Affected: kernel 5.8.17

Show details on NVD website

JSON

To clipboard

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Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

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.

Action not permitted

CERTFR-2020-AVI-711

Solution

CVE-2020-16120 (GCVE-0-2020-16120)

CVE-2020-25285 (GCVE-0-2020-25285)

CVE-2020-14351 (GCVE-0-2020-14351)

Tags

Sightings

Nomenclature