openEuler update for kernel



Published: 2021-12-07
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-3759
CVE-2021-3753
CWE-ID CWE-400
CWE-125
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe 		openEuler
Operating systems & Components / Operating system

kernel-tools-debuginfo
Operating systems & Components / Operating system package or component

python2-perf
Operating systems & Components / Operating system package or component

python3-perf-debuginfo
Operating systems & Components / Operating system package or component

kernel-tools
Operating systems & Components / Operating system package or component

perf
Operating systems & Components / Operating system package or component

kernel-devel
Operating systems & Components / Operating system package or component

python3-perf
Operating systems & Components / Operating system package or component

perf-debuginfo
Operating systems & Components / Operating system package or component

bpftool
Operating systems & Components / Operating system package or component

bpftool-debuginfo
Operating systems & Components / Operating system package or component

kernel-tools-devel
Operating systems & Components / Operating system package or component

kernel-source
Operating systems & Components / Operating system package or component

kernel-debugsource
Operating systems & Components / Operating system package or component

kernel-debuginfo
Operating systems & Components / Operating system package or component

python2-perf-debuginfo
Operating systems & Components / Operating system package or component

kernel
Operating systems & Components / Operating system package or component

Vendor openEuler

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU63914

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-2021-3759

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 in the Linux kernel’s ipc functionality of the memcg subsystem when user calls the semget function multiple times, creating semaphores. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

kernel-tools-debuginfo: before 4.19.90-2111.7.0.0125

python2-perf: before 4.19.90-2111.7.0.0125

python3-perf-debuginfo: before 4.19.90-2111.7.0.0125

kernel-tools: before 4.19.90-2111.7.0.0125

perf: before 4.19.90-2111.7.0.0125

kernel-devel: before 4.19.90-2111.7.0.0125

python3-perf: before 4.19.90-2111.7.0.0125

perf-debuginfo: before 4.19.90-2111.7.0.0125

bpftool: before 4.19.90-2111.7.0.0125

bpftool-debuginfo: before 4.19.90-2111.7.0.0125

kernel-tools-devel: before 4.19.90-2111.7.0.0125

kernel-source: before 4.19.90-2111.7.0.0125

kernel-debugsource: before 4.19.90-2111.7.0.0125

kernel-debuginfo: before 4.19.90-2111.7.0.0125

python2-perf-debuginfo: before 4.19.90-2111.7.0.0125

kernel: before 4.19.90-2111.7.0.0125

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1453


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) Out-of-bounds read

EUVDB-ID: #VU64210

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3753

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 in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel. A local user can trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

kernel-tools-debuginfo: before 4.19.90-2111.7.0.0125

python2-perf: before 4.19.90-2111.7.0.0125

python3-perf-debuginfo: before 4.19.90-2111.7.0.0125

kernel-tools: before 4.19.90-2111.7.0.0125

perf: before 4.19.90-2111.7.0.0125

kernel-devel: before 4.19.90-2111.7.0.0125

python3-perf: before 4.19.90-2111.7.0.0125

perf-debuginfo: before 4.19.90-2111.7.0.0125

bpftool: before 4.19.90-2111.7.0.0125

bpftool-debuginfo: before 4.19.90-2111.7.0.0125

kernel-tools-devel: before 4.19.90-2111.7.0.0125

kernel-source: before 4.19.90-2111.7.0.0125

kernel-debugsource: before 4.19.90-2111.7.0.0125

kernel-debuginfo: before 4.19.90-2111.7.0.0125

python2-perf-debuginfo: before 4.19.90-2111.7.0.0125

kernel: before 4.19.90-2111.7.0.0125

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1453


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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