Multiple vulnerabilities in Red Hat Advanced Cluster Management for Kubernetes 2.1



Published: 2021-10-21 | Updated: 2022-06-03
Risk High
Patch available YES
Number of vulnerabilities 19
CVE-ID CVE-2021-32672
CVE-2021-22922
CVE-2021-37750
CVE-2021-37576
CVE-2021-36222
CVE-2021-23841
CVE-2021-23840
CVE-2021-22924
CVE-2021-22923
CVE-2021-22543
CVE-2021-41099
CVE-2021-3656
CVE-2021-3653
CVE-2016-4658
CVE-2021-32675
CVE-2021-32687
CVE-2021-32628
CVE-2021-32627
CVE-2021-32626
CWE-ID CWE-125
CWE-611
CWE-476
CWE-787
CWE-20
CWE-295
CWE-522
CWE-119
CWE-190
CWE-264
CWE-416
CWE-122
Exploitation vector Network
Public exploit Public exploit code for vulnerability #10 is available.
Vulnerable software
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Red Hat Advanced Cluster Management for Kubernetes
Server applications / Other server solutions

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 19 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU57035

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-32672

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition, related to Lua Debugger. A remote attacker can read random data from heap.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) XML External Entity injection

EUVDB-ID: #VU55148

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-22922

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) NULL pointer dereference

EUVDB-ID: #VU56828

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-37750

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the Key Distribution Center (KDC) in kdc/do_tgs_req.c. A remote user can pass specially crafted data via the FAST inner body that lacks a server field, trigger a NULL pointer dereference error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Out-of-bounds write

EUVDB-ID: #VU57101

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-37576

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to a boundary error in arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform. An attacker on KVM guest OS can cause host OS memory corruption via rtas_args.nargs and execute arbitrary code on the host OS.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

5) NULL pointer dereference

EUVDB-ID: #VU55287

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-36222

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5). A remote attacker can send a request containing a PA-ENCRYPTED-CHALLENGE padata element without using FAST and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

6) NULL pointer dereference

EUVDB-ID: #VU50740

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23841

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the X509_issuer_and_serial_hash() function when parsing the issuer field in the X509 certificate. A remote attacker can supply a specially crafted certificate, trigger a NULL pointer dereference error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

7) Input validation error

EUVDB-ID: #VU50745

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23840

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input during EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate calls. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

8) Improper Certificate Validation

EUVDB-ID: #VU55146

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-22924

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to errors in the logic when the config matching function does not take "issuer cert" into account and it compares the involved paths case insensitively. A remote attacker can gain access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

9) Insufficiently protected credentials

EUVDB-ID: #VU55145

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-22923

CWE-ID: CWE-522 - Insufficiently Protected Credentials

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficiently protected credentials. A remote attacker can gain access to sensitive information on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

10) Buffer overflow

EUVDB-ID: #VU56018

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-22543

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in Linux kernel when handling VM_IO|VM_PFNMAP vmas in KVM. A local user can  can bypass RO checks and cause the pages to get freed while still accessible by the VMM and guest. As a result, an attacker with the ability to start and control a VM to read/write random pages of memory, can trigger memory corruption and execute arbitrary code with elevated privileges.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

11) Integer overflow

EUVDB-ID: #VU57029

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-41099

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when handling untrusted input, if proto-max-bulk-len is manually configured to a non-default, very large value. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

12) Security restrictions bypass

EUVDB-ID: #VU56929

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-3656

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a malicious guest to escalate privileges on the system.

The vulnerability exists due to improperly imposed security restrictions within the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "virt_ext" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest.

The vulnerability allows the L2 guest to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

13) Security restrictions bypass

EUVDB-ID: #VU56904

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-3653

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a malicious guest to escalate privileges on the system.

The vulnerability exists due to improperly imposed security restrictions within the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest.

As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

14) Use-after-free

EUVDB-ID: #VU57346

Risk: High

CVSSv3.1:

CVE-ID: CVE-2016-4658

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error, caused by using namespace nodes in XPointer ranges within the xpointer.c in libxml2. A remote attackers can pass specially crated XML document to he application, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

15) Input validation error

EUVDB-ID: #VU57034

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-32675

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing RESP request payloads with a large number of elements on many connections. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

16) Integer overflow

EUVDB-ID: #VU57031

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-32687

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when handling intsets, if set-max-intset-entries is manually configured to a non-default, very large value. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

17) Integer overflow

EUVDB-ID: #VU57032

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-32628

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when handling ziplist-encoded data types, when configuring a large, non-default value for hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries or zset-max-ziplist-value. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

18) Integer overflow

EUVDB-ID: #VU57033

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-32627

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when handling streams, if configuring a non-default, large value for proto-max-bulk-len and client-query-buffer-limit. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

19) Heap-based buffer overflow

EUVDB-ID: #VU57036

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-32626

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing specially crafted Lua scripts. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Advanced Cluster Management for Kubernetes: 2.1.0 - 2.1.11


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:3949

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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