Ubuntu update for edk2

1) Input validation error

EUVDB-ID: #VU70612

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-11098

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows an attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input in MdeModulePkg. An attacker with physical access to the affected system can execute arbitrary code.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.04

ovmf (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-aarch64 (Ubuntu package): before 2020.11-4ubuntu0.1

ovmf-ia32 (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-arm (Ubuntu package): before 2020.11-4ubuntu0.1

External links

http://ubuntu.com/security/notices/USN-5088-1

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Input validation error

EUVDB-ID: #VU50745

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-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

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.04

ovmf (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-aarch64 (Ubuntu package): before 2020.11-4ubuntu0.1

ovmf-ia32 (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-arm (Ubuntu package): before 2020.11-4ubuntu0.1

External links

http://ubuntu.com/security/notices/USN-5088-1

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) Out-of-bounds read

EUVDB-ID: #VU56064

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3712

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 when processing ASN.1 strings related to a confusion with NULL termination of strings in array. A remote attacker can pass specially crafted data to the application to trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.04

ovmf (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-aarch64 (Ubuntu package): before 2020.11-4ubuntu0.1

ovmf-ia32 (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-arm (Ubuntu package): before 2020.11-4ubuntu0.1

External links

http://ubuntu.com/security/notices/USN-5088-1

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.

4) Buffer overflow

EUVDB-ID: #VU56490

Risk: Medium

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

CVE-ID: CVE-2021-38575

CWE-ID: CWE-119 - Memory corruption

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 in the IScsiHexToBin() function in NetworkPkg/IScsiDxe. A remote attacker with ability to inject data into communication between edk2 and the iSCSI target can execute arbitrary code on the target system.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.04

ovmf (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-aarch64 (Ubuntu package): before 2020.11-4ubuntu0.1

ovmf-ia32 (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi (Ubuntu package): before 2020.11-4ubuntu0.1

qemu-efi-arm (Ubuntu package): before 2020.11-4ubuntu0.1

External links

http://ubuntu.com/security/notices/USN-5088-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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