Multiple vulnerabilities in Red Hat Virtualization for RHEL 8



Published: 2021-06-03
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-25659
CVE-2020-28196
CVE-2020-36242
CWE-ID CWE-385
CWE-674
CWE-190
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		scap-security-guide (Red Hat package)
Operating systems & Components / Operating system package or component

redhat-release-virtualization-host (Red Hat package)
Operating systems & Components / Operating system package or component

imgbased (Red Hat package)
Operating systems & Components / Operating system package or component

cockpit-ovirt (Red Hat package)
Operating systems & Components / Operating system package or component

redhat-virtualization-host (Red Hat package)
Operating systems & Components / Operating system package or component

ovirt-hosted-engine-ha (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Virtualization Host
Web applications / Remote management & hosting panels

Red Hat Virtualization
Server applications / Virtualization software

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Covert Timing Channel

EUVDB-ID: #VU50367

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25659

CWE-ID: CWE-385 - Covert Timing Channel

Exploit availability: No

Description

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

python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

scap-security-guide (Red Hat package): 0.1.50-1.el8ev

redhat-release-virtualization-host (Red Hat package): 4.4.2-1.el8ev - 4.4.5-4.el8ev

imgbased (Red Hat package): 1.2.12-0.1.el8ev - 1.2.18-0.1.el8ev

cockpit-ovirt (Red Hat package): 0.14.11-1.el8ev - 0.14.17-1.el8ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

redhat-virtualization-host (Red Hat package): before 4.4.6-20210527.3.el8_4

ovirt-hosted-engine-ha (Red Hat package): before 2.4.7-1.el8ev

External links

http://access.redhat.com/errata/RHSA-2021:2239


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Uncontrolled Recursion

EUVDB-ID: #VU48444

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28196

CWE-ID: CWE-674 - Uncontrolled Recursion

Exploit availability: No

Description

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

The vulnerability exists due to uncontrolled recursion in MIT Kerberos 5 (aka krb5) implementation when processing ASN.1-encoded Kerberos messages in lib/krb5/asn.1/asn1_encode.c. A remote attacker can pass specially crafted data to the application that uses Kerberos and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

scap-security-guide (Red Hat package): 0.1.50-1.el8ev

redhat-release-virtualization-host (Red Hat package): 4.4.2-1.el8ev - 4.4.5-4.el8ev

imgbased (Red Hat package): 1.2.12-0.1.el8ev - 1.2.18-0.1.el8ev

cockpit-ovirt (Red Hat package): 0.14.11-1.el8ev - 0.14.17-1.el8ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

redhat-virtualization-host (Red Hat package): before 4.4.6-20210527.3.el8_4

ovirt-hosted-engine-ha (Red Hat package): before 2.4.7-1.el8ev

External links

http://access.redhat.com/errata/RHSA-2021:2239


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Integer overflow

EUVDB-ID: #VU50990

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-36242

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 processing certain sequences of update calls to symmetrically encrypt multi-GB values. A remote attacker can pass specially crafted data to the application, trigger 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

scap-security-guide (Red Hat package): 0.1.50-1.el8ev

redhat-release-virtualization-host (Red Hat package): 4.4.2-1.el8ev - 4.4.5-4.el8ev

imgbased (Red Hat package): 1.2.12-0.1.el8ev - 1.2.18-0.1.el8ev

cockpit-ovirt (Red Hat package): 0.14.11-1.el8ev - 0.14.17-1.el8ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

redhat-virtualization-host (Red Hat package): before 4.4.6-20210527.3.el8_4

ovirt-hosted-engine-ha (Red Hat package): before 2.4.7-1.el8ev

External links

http://access.redhat.com/errata/RHSA-2021:2239


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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