Debian update for linux



Published: 2022-01-21
Risk Medium
Patch available YES
Number of vulnerabilities 12
CVE-ID CVE-2021-28711
CVE-2021-28712
CVE-2021-28713
CVE-2021-28714
CVE-2021-28715
CVE-2021-39685
CVE-2021-4155
CVE-2021-45095
CVE-2021-45469
CVE-2021-45480
CVE-2022-0185
CVE-2022-23222
CWE-ID CWE-400
CWE-404
CWE-119
CWE-264
CWE-200
CWE-125
CWE-401
CWE-190
Exploitation vector Network
Public exploit Public exploit code for vulnerability #6 is available.
Public exploit code for vulnerability #11 is available.
Public exploit code for vulnerability #12 is available.
Vulnerable software
Subscribe 		Debian Linux
Operating systems & Components / Operating system

linux (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains information about 12 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU63563

Risk: Low

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

CVE-ID: CVE-2021-28711

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to improper limits for number of events driver domains could send to other guest VMs. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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) Resource exhaustion

EUVDB-ID: #VU63564

Risk: Low

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

CVE-ID: CVE-2021-28712

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to improper limits for number of events driver domains could send to other guest VMs. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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) Resource exhaustion

EUVDB-ID: #VU63565

Risk: Low

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

CVE-ID: CVE-2021-28713

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to improper limits for number of events driver domains could send to other guest VMs. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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) Improper Resource Shutdown or Release

EUVDB-ID: #VU63583

Risk: Medium

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

CVE-ID: CVE-2021-28714

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

Exploit availability: No

Description

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

The vulnerability exists due to incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. A remote user can use a UDP connection on a fast interface to trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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.

5) Improper Resource Shutdown or Release

EUVDB-ID: #VU63584

Risk: Medium

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

CVE-ID: CVE-2021-28715

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

Exploit availability: No

Description

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

The vulnerability exists due to incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. A remote user can use a UDP connection on a fast interface to trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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.

6) Buffer overflow

EUVDB-ID: #VU61095

Risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-39685

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a malicious host to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the USB subsystem in Linux kernel. A malicious USB device can trigger memory corruption and execute arbitrary code on the system.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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. However, proof of concept for this vulnerability is available.

7) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU59812

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4155

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to the OS kernel does not impose correctly security restrictions. A local user can gain access to sensitive information on the system.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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.

8) Information disclosure

EUVDB-ID: #VU61579

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-45095

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to a refcount leak within the pep_sock_accept() function in net/phonet/pep.c in the Linux kernel. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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.

9) Out-of-bounds read

EUVDB-ID: #VU63578

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-2021-45469

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

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to a boundary condition in the __f2fs_setxattr() function in fs/f2fs/xattr.c in the Linux kernel when an inode has an invalid last xattr entry. A local user can create a specially crafted f2fs image, trigger an out-of-bounds read error, and perform a denial of service attack or possibly execute arbitrary code.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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.

10) Memory leak

EUVDB-ID: #VU63568

Risk: Low

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-45480

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 within the __rds_conn_create() function in net/rds/connection.c. A local user can perform a denial of service attack.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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.

11) Integer overflow

EUVDB-ID: #VU59695

Risk: Low

CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-0185

CWE-ID: CWE-190 - Integer overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to integer overflow in the legacy_parse_param() function in fs/fs_context.c in Linux kernel. A local user can tun a specially crafted program to trigger integer overflow and execute arbitrary code with root privileges.


Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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. However, proof of concept for this vulnerability is available.

12) Security restrictions bypass

EUVDB-ID: #VU59896

Risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-23222

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

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

The vulnerability exists due to availability of pointer arithmetic via certain *_OR_NULL pointer types in kernel/bpf/verifier.c in the Linux kernel. A local user can run a specially crafted program to execute arbitrary code with root privileges.

Mitigation

Update linux package to version 5.10.92-1.

Vulnerable software versions

Debian Linux: All versions

linux (Debian package): before 5.10.92-1

External links

http://www.debian.org/security/2022/dsa-5050


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. However, proof of concept for this vulnerability is available.



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