Ubuntu update for linux-oem-5.14



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-3744
CVE-2021-3764
CVE-2021-41864
CWE-ID CWE-401
CWE-787
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Ubuntu
Operating systems & Components / Operating system

linux-image-5.14.0-1007-oem (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem-20.04d (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU63813

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3744

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c. A local user can force the application to leak memory and perform denial of service attack.

Mitigation

Update the affected package linux-oem-5.14 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-5.14.0-1007-oem (Ubuntu package): before 5.14.0-1007.7

linux-image-oem-20.04d (Ubuntu package): before 5.14.0.1007.7

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5140-1


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) Memory leak

EUVDB-ID: #VU63817

Risk: Medium

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

CVE-ID: CVE-2021-3764

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak error in the ccp_run_aes_gcm_cmd() function in Linux kernel. A local user can trigger a memory leak error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-oem-5.14 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-5.14.0-1007-oem (Ubuntu package): before 5.14.0-1007.7

linux-image-oem-20.04d (Ubuntu package): before 5.14.0.1007.7

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5140-1


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 write

EUVDB-ID: #VU63855

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41864

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing untrusted input. A local user can gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information.

Mitigation

Update the affected package linux-oem-5.14 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-5.14.0-1007-oem (Ubuntu package): before 5.14.0-1007.7

linux-image-oem-20.04d (Ubuntu package): before 5.14.0.1007.7

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5140-1


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.



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