Ubuntu update for linux-oem-5.17

Published: 2023-07-26 | Updated: 2023-09-04

Risk	Medium
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2022-2663 CVE-2022-3635 CVE-2022-47929 CVE-2023-2860 CVE-2023-31248 CVE-2023-35001
CWE-ID	CWE-20 CWE-416 CWE-476 CWE-125 CWE-787
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #6 is available.
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-oem-22.04a (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem-22.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.17.0-1035-oem (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU67510

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-2663

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass firewall rules.

The vulnerability exists due to insufficient validation of user-supplied input in nf_conntrack_irc in Linux kernel. A remote attacker can send unencrypted IRC with nf_conntrack_irc configured and bypass configured firewall rules.

Mitigation

Update the affected package linux-oem-5.17 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04a (Ubuntu package): before 5.17.0.1035.33

linux-image-oem-22.04 (Ubuntu package): before 5.17.0.1035.33

linux-image-5.17.0-1035-oem (Ubuntu package): before 5.17.0-1035.36

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6247-1

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.

2) Use-after-free

EUVDB-ID: #VU69398

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-2022-3635

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the drivers/atm/idt77252.c in IPsec component of Linux kernel. A local user can trigger a use-after-free error and crash the kernel.

Mitigation

Update the affected package linux-oem-5.17 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04a (Ubuntu package): before 5.17.0.1035.33

linux-image-oem-22.04 (Ubuntu package): before 5.17.0.1035.33

linux-image-5.17.0-1035-oem (Ubuntu package): before 5.17.0-1035.36

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6247-1

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) NULL pointer dereference

EUVDB-ID: #VU71479

Risk: Medium

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:Green]

CVE-ID: CVE-2022-47929

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in the traffic control subsystem in Linux kernel. A local user can pass pass a specially crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-oem-5.17 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04a (Ubuntu package): before 5.17.0.1035.33

linux-image-oem-22.04 (Ubuntu package): before 5.17.0.1035.33

linux-image-5.17.0-1035-oem (Ubuntu package): before 5.17.0-1035.36

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6247-1

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) Out-of-bounds read

EUVDB-ID: #VU78675

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-2860

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 SR-IPv6 implementation when processing seg6 attributes. A local user can trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected package linux-oem-5.17 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04a (Ubuntu package): before 5.17.0.1035.33

linux-image-oem-22.04 (Ubuntu package): before 5.17.0.1035.33

linux-image-5.17.0-1035-oem (Ubuntu package): before 5.17.0-1035.36

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6247-1

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) Use-after-free

EUVDB-ID: #VU78325

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-2023-31248

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in nft_chain_lookup_byid() function, which failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace. A local user ca trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-oem-5.17 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04a (Ubuntu package): before 5.17.0.1035.33

linux-image-oem-22.04 (Ubuntu package): before 5.17.0.1035.33

linux-image-5.17.0-1035-oem (Ubuntu package): before 5.17.0-1035.36

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6247-1

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.

6) Out-of-bounds write

EUVDB-ID: #VU78326

Risk: Low

CVSSv4.0: 7.1 [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:P/U:Clear]

CVE-ID: CVE-2023-35001

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

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error within the nft_byteorder() function. A local user can trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected package linux-oem-5.17 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04a (Ubuntu package): before 5.17.0.1035.33

linux-image-oem-22.04 (Ubuntu package): before 5.17.0.1035.33

linux-image-5.17.0-1035-oem (Ubuntu package): before 5.17.0-1035.36

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6247-1

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