CVE-2023-2640

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640	Third Party Advisory
https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html	Mailing List Patch
https://ubuntu.com/security/notices/USN-6250-1	Vendor Advisory
https://wiz.io/blog/ubuntu-overlayfs-vulnerability	Exploit Mitigation Third Party Advisory
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640	Third Party Advisory
https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html	Mailing List Patch
https://ubuntu.com/security/notices/USN-6250-1	Vendor Advisory
https://wiz.io/blog/ubuntu-overlayfs-vulnerability	Exploit Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:canonical:ubuntu_linux:23.04:*:*:*:*:*:*:*

History

21 Nov 2024, 07:58

Type	Values Removed	Values Added
References	~~() https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640 - Third Party Advisory~~	() https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640 - Third Party Advisory
References	~~() https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html - Mailing List, Patch~~	() https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html - Mailing List, Patch
References	~~() https://ubuntu.com/security/notices/USN-6250-1 - Vendor Advisory~~	() https://ubuntu.com/security/notices/USN-6250-1 - Vendor Advisory
References	~~() https://wiz.io/blog/ubuntu-overlayfs-vulnerability - Exploit, Mitigation, Third Party Advisory~~	() https://wiz.io/blog/ubuntu-overlayfs-vulnerability - Exploit, Mitigation, Third Party Advisory

03 Aug 2023, 15:10

Type	Values Removed	Values Added
First Time		Canonical Canonical ubuntu Linux
CWE		CWE-863
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8
CPE		cpe:2.3:o:canonical:ubuntu_linux:23.04:::::::*
References	~~(MISC) https://ubuntu.com/security/notices/USN-6250-1 -~~	(MISC) https://ubuntu.com/security/notices/USN-6250-1 - Vendor Advisory
References	~~(MISC) https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640 -~~	(MISC) https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640 - Third Party Advisory
References	~~(MISC) https://wiz.io/blog/ubuntu-overlayfs-vulnerability -~~	(MISC) https://wiz.io/blog/ubuntu-overlayfs-vulnerability - Exploit, Mitigation, Third Party Advisory
References	~~(MISC) https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html -~~	(MISC) https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html - Mailing List, Patch

26 Jul 2023, 04:24

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-07-26 02:15

Updated : 2024-11-21 07:58

NVD link : CVE-2023-2640

Mitre link : CVE-2023-2640

CVE.ORG link : CVE-2023-2640

JSON object : View

Products Affected

canonical

ubuntu_linux

CWE

CWE-863

Incorrect Authorization

{"id": "CVE-2023-2640", "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2023-07-26T02:15:09.300", "references": [{"url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640", "tags": ["Third Party Advisory"], "source": "security@ubuntu.com"}, {"url": "https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html", "tags": ["Mailing List", "Patch"], "source": "security@ubuntu.com"}, {"url": "https://ubuntu.com/security/notices/USN-6250-1", "tags": ["Vendor Advisory"], "source": "security@ubuntu.com"}, {"url": "https://wiz.io/blog/ubuntu-overlayfs-vulnerability", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "source": "security@ubuntu.com"}, {"url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://ubuntu.com/security/notices/USN-6250-1", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://wiz.io/blog/ubuntu-overlayfs-vulnerability", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-863"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "On Ubuntu kernels carrying both c914c0e27eb0 and \"UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs\", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks."}], "lastModified": "2024-11-21T07:58:59.060", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:23.04:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B2E702D7-F8C0-49BF-9FFB-883017076E98"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}

7.8 /10