Ubuntu update for linux-oem-5.6



Risk Low
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2020-35519
CVE-2021-28375
CVE-2021-29646
CVE-2021-29650
CVE-2021-30002
CWE-ID CWE-125
CWE-862
CWE-20
CWE-119
CWE-401
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

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

linux-image-5.6.0-1056-oem (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU51552

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-35519

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

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the x25_bind() function in net/x25/af_x25.c in the Linux kernel. A local user can run a specially crafted program to read contents of memory on the system.

Mitigation

Update the affected package linux-oem-5.6 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04 (Ubuntu package): before 5.6.0.1056.52

linux-image-5.6.0-1056-oem (Ubuntu package): before 5.6.0-1056.60

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4947-1


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) Missing authorization

EUVDB-ID: #VU92415

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28375

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to missing authorization error within the fastrpc_internal_invoke() function in drivers/misc/fastrpc.c. A local user can execute arbitrary code.

Mitigation

Update the affected package linux-oem-5.6 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04 (Ubuntu package): before 5.6.0.1056.52

linux-image-5.6.0-1056-oem (Ubuntu package): before 5.6.0-1056.60

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4947-1


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) Input validation error

EUVDB-ID: #VU94153

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29646

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation within the tipc_nl_node_dump_monitor_peer() function in net/tipc/node.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-oem-5.6 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04 (Ubuntu package): before 5.6.0.1056.52

linux-image-5.6.0-1056-oem (Ubuntu package): before 5.6.0-1056.60

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4947-1


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.

4) Buffer overflow

EUVDB-ID: #VU56240

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29650

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the netfilter subsystem in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h. A local user can trigger memory corruption upon the assignment of a new table value and cause denial of service.

Mitigation

Update the affected package linux-oem-5.6 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04 (Ubuntu package): before 5.6.0.1056.52

linux-image-5.6.0-1056-oem (Ubuntu package): before 5.6.0-1056.60

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4947-1


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) Memory leak

EUVDB-ID: #VU68552

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-30002

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 within the webcam support driver in video_usercopy() function in drivers/media/v4l2-core/v4l2-ioctl.c in Linux kernel. A local user can trigger leak memory and perform denial of service attack.

Mitigation

Update the affected package linux-oem-5.6 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04 (Ubuntu package): before 5.6.0.1056.52

linux-image-5.6.0-1056-oem (Ubuntu package): before 5.6.0-1056.60

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4947-1


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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