Vulnerability CVE-2021-38155

Vulnerability Name:

CVE-2021-38155 (CCN-206942)

Assigned:

2017-05-03

Published:

2017-05-03

Updated:

2021-08-18

Summary:

OpenStack Keystone 10.x through 16.x before 16.0.2, 17.x before 17.0.1, 18.x before 18.0.1, and 19.x before 19.0.1 allows information disclosure during account locking (related to PCI DSS features). By guessing the name of an account and failing to authenticate multiple times, any unauthenticated actor could both confirm the account exists and obtain that account's corresponding UUID, which might be leveraged for other unrelated attacks. All deployments enabling security_compliance.lockout_failure_attempts are affected.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): Low Integrity (I): None Availibility (A): None

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

Vulnerability Type:

CWE-307

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2021-38155

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20210810 [OSSA-2021-003] Keystone: Account name and UUID oracles in account locking (CVE-2021-38155)

Source: CCN
Type: Bug #1688137
Account name and UUID oracles in account locking (CVE-2021-38155)

Source: CCN
Type: OpenStack Web site
keystone

Source: XF
Type: UNKNOWN
openstack-cve202138155-info-disc(206942)

Source: MISC
Type: Exploit, Issue Tracking, Patch, Third Party Advisory
https://launchpad.net/bugs/1688137

Source: CONFIRM
Type: Patch, Vendor Advisory
https://security.openstack.org/ossa/OSSA-2021-003.html

Vulnerable Configuration:

Configuration 1:

cpe:/a:openstack:keystone:*:*:*:*:*:*:*:* (Version >= 10.0.0 and < 16.0.2)

OR cpe:/a:openstack:keystone:*:*:*:*:*:*:*:* (Version >= 17.0.0 and < 17.0.1)

OR cpe:/a:openstack:keystone:*:*:*:*:*:*:*:* (Version >= 18.0.0 and < 18.0.1)

OR cpe:/a:openstack:keystone:*:*:*:*:*:*:*:* (Version >= 19.0.0 and < 19.0.1)

Configuration CCN 1:

cpe:/a:openstack:keystone:-:*:*:*:*:*:*:*

Denotes that component is vulnerable

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