Ubuntu update for linux



Published: 2022-08-11 | Updated: 2022-10-02
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-2586
CVE-2022-2588
CWE-ID CWE-416
CWE-415
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Vulnerable software
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Ubuntu
Operating systems & Components / Operating system

linux-image-virtual-lts-xenial (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency-lts-xenial (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.4.0-1111-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lts-xenial (Ubuntu package)
Operating systems & Components / Operating system package or component

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

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

linux-image-4.4.0-231-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.4.0-1147-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.4.0-231-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.4.0-1112-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

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

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

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

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU66396

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-2586

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a use-after-free error within the the netfilter subsystem implementation in Linux kernel when preventing one nft object from referencing an nft set in another nft table. A local user can trigger a use-after-free error and execute arbitrary code on the system with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 16.04, 14.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.231.237

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-1111-aws (Ubuntu package): before 4.4.0.231.237

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.231.237

linux-image-lowlatency (Ubuntu package): before 4.4.0.231.237

linux-image-kvm (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-231-generic (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-1147-aws (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-231-lowlatency (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-1112-kvm (Ubuntu package): before 4.4.0.231.237

linux-image-aws (Ubuntu package): before 4.4.0.231.237

linux-image-generic (Ubuntu package): before 4.4.0.231.237

linux-image-virtual (Ubuntu package): before 4.4.0.231.237


CPE2.3 External links

http://ubuntu.com/security/notices/USN-5557-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Double Free

EUVDB-ID: #VU66397

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-2588

CWE-ID: CWE-415 - Double Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a double free error within the network packet scheduler implementation in the route4_change() function in Linux kernel when removing all references to a route filter before freeing it. A local user can run a specially crafted program to crash the kernel or execute arbitrary code.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 16.04, 14.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.231.237

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-1111-aws (Ubuntu package): before 4.4.0.231.237

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.231.237

linux-image-lowlatency (Ubuntu package): before 4.4.0.231.237

linux-image-kvm (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-231-generic (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-1147-aws (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-231-lowlatency (Ubuntu package): before 4.4.0.231.237

linux-image-4.4.0-1112-kvm (Ubuntu package): before 4.4.0.231.237

linux-image-aws (Ubuntu package): before 4.4.0.231.237

linux-image-generic (Ubuntu package): before 4.4.0.231.237

linux-image-virtual (Ubuntu package): before 4.4.0.231.237


CPE2.3 External links

http://ubuntu.com/security/notices/USN-5557-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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