Ubuntu update for edk2

1) Privilege escalation

EUVDB-ID: #VU16719

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-5731

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to an error when handling malicious input. A local attacker can supply specially crafted files in TianoCompress.c and gain elevated privileges.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Buffer overflow

EUVDB-ID: #VU95178

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12182

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to insufficient memory write check in SMM service. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

3) Stack-based buffer overflow

EUVDB-ID: #VU95176

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-2018-12183

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in DxeCore. An attacker with physical access to the system can trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

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.

4) Authentication bypass

EUVDB-ID: #VU16724

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-3613

CWE-ID: CWE-840 - Business Logic Errors (3.0)

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to logic error in MdeModulePkg. A local attacker can bypass configuration access controls and gain elevated privileges.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

5) Out-of-bounds write

EUVDB-ID: #VU95175

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-2019-0160

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input. A remote attacker can send specially crafted input to the application, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

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.

6) Cross-site scripting

EUVDB-ID: #VU13869

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-9335

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote authenticated attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

7) Cross-site scripting

EUVDB-ID: #VU13868

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-9337

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote authenticated attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

8) Information disclosure

EUVDB-ID: #VU13863

Risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-9334

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote authenticated administrator attacker to obtain potentially sensitive information on the target system.

The vulnerability exists due to unspecified flaw. A remote attacker can modify HTML markup on the management web interface to obtain GlobalProtect password hashes of local users.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

9) Security restrictions bypass

EUVDB-ID: #VU13862

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-9242

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to bypass security restrictions on the target system.

The vulnerability exists due to an error when processing malicious input. A remote attacker can supply specially crafted request parameters to exploit a flaw in the Management interface and delete files on the target system.

Mitigation

Update the affected package edk2 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

qemu-efi-arm (Ubuntu package): before Ubuntu Pro

qemu-efi-aarch64 (Ubuntu package): before Ubuntu Pro

qemu-efi (Ubuntu package): before Ubuntu Pro

ovmf (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6920-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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