Security Bulletin: IBM Security Verify Password Synchronization Plug-in for Windows AD affected by multiple vulnerabilities (CVE-2021-20488, CVE-2021-20494, CVE-2021-20572, CVE-2021-20573, CVE-2021-20574)

Security Bulletin

Summary

IBM has announced a release for IBM Security Verify Password Synchronization Plug-in for Windows AD to address several security vulnerabilities. The vulnerabilities concern denial of service and account take over.

Vulnerability Details

CVEID: CVE-2021-20572
DESCRIPTION: IBM Security Identity Manager Adapters are vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A remote authenticated attacker could overflow the and cause the server to crash.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/199247 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2021-20494
DESCRIPTION: IBM Security Identity Manager Active Directory Password Synch Plug-in is vulnerable to a heap based buffer overflow, caused by improper bounds. An authenticared user could overflow the buffer and cause the service to crash.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/197882 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2021-20574
DESCRIPTION: IBM Security Identity Manager Adapters could allow a remote authenticated attacker to conduct an LDAP injection. By using a specially crafted request, an attacker could exploit this vulnerability and takeover other accounts.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/199252 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2021-20488
DESCRIPTION: IBM Security Identity Manager 6.0.2 could allow an authenticated malicious user to change the passwords of other users in the Windows AD environment when IBM Security Identity Manager Windows Password Synch Plug-in is deployed and configured. IBM X-Force ID: 197789.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/197789 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2021-20573
DESCRIPTION: IBM Security Identity Manager Adapters are vulnerable to a heap-based buffer overflow, caused by improper bounds checking. A remote authenticated attacker could overflow the and cause the server to crash.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/199249 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM Security Identity Manager Adapters	6.0, 7.0

Remediation/Fixes

Affected component	First fix
IBM Security Identity Governance Windows Password Synch Plug-In v7.1.x	IBM Security Verify Password Synchronization Plug-in for Windows AD v10.0.1 https://www.ibm.com/support/pages/ibm-security-verify-adapters-v10x
ISIM Password Sync Plug-in for WinAD 64-bit v7.0.x	IBM Security Verify Password Synchronization Plug-in for Windows AD v10.0.1 https://www.ibm.com/support/pages/ibm-security-verify-adapters-v10x
ISIM v6.0 Password Sync Plug-in for WinAD 64-bit v6.0.x	IBM Security Verify Password Synchronization Plug-in for Windows AD v10.0.1 https://www.ibm.com/support/pages/ibm-security-verify-adapters-v10x

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Vulnerabilities reported to IBM by Krzysztof Andrusiak, Marcin Ogorzelski of STM Cyber: CVE-2021-20572, CVE-2021-20573, CVE-2021-20574. Vulnerabilities reported to IBM by Maciej Grabiec, Tomasz Wiśniewski: CVE-2021-20488 and CVE-2021-20494.

Change History

10 Jun 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Tips

Security Bulletin: IBM Security Verify Password Synchronization Plug-in for Windows AD affected by multiple vulnerabilities (CVE-2021-20488, CVE-2021-20494, CVE-2021-20572, CVE-2021-20573, CVE-2021-20574)