openEuler update for kernel



Risk Medium
Patch available YES
Number of vulnerabilities 10
CVE-ID CVE-2020-14351
CVE-2020-27675
CVE-2020-25656
CVE-2020-12352
CVE-2020-29661
CVE-2020-27777
CVE-2020-29660
CVE-2020-29569
CVE-2020-27815
CVE-2020-27830
CWE-ID CWE-416
CWE-476
CWE-284
CWE-667
CWE-862
CWE-252
CWE-125
Exploitation vector Local network
Public exploit Public exploit code for vulnerability #4 is available.
Public exploit code for vulnerability #5 is available.
Vulnerable software
 openEuler
Operating systems & Components / Operating system

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

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

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

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

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

perf
Operating systems & Components / Operating system package or component

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

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

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

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

kernel-devel
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

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

bpftool
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 10 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU51544

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-2020-14351

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 within the perf subsystem. A local user with permission to monitor perf events cam corrupt memory and execute arbitrary code with elevated privileges.


Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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) NULL pointer dereference

EUVDB-ID: #VU83584

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-2020-27675

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 drivers/xen/events/events_base.c. A malicious guest can trigger a dom0 crash by sending events for a paravirtualized device while simultaneously performing its reconfiguration.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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) Use-after-free

EUVDB-ID: #VU51547

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-2020-25656

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the way the console subsystem uses KDGKBSENT and KDSKBSENT IOCTLs. A local user can run a specially crafted program to trigger an out-of-bounds read and gain access to sensitive information.


Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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 access control

EUVDB-ID: #VU47546

Risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-12352

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to improper access restrictions in BlueZ implementation in Linux kernel. A remote attacker on the local network can pass specially crafted input to the application and gain access to sensitive information.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

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.

5) Improper locking

EUVDB-ID: #VU51543

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-2020-29661

CWE-ID: CWE-667 - Improper Locking

Exploit availability: Yes

Description

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

The vulnerability exists due to locking error in the tty subsystem of the Linux kernel in drivers/tty/tty_jobctrl.c. An local user can exploit this vulnerability to trigger a use-after-free error against TIOCSPGRP and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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.

6) Missing Authorization

EUVDB-ID: #VU56242

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27777

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No

Description

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

The vulnerability exists due to the way RTAS handles memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like user could use this flaw to further increase their privileges to that of a running kernel.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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.

7) Improper locking

EUVDB-ID: #VU57039

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-29660

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The vulnerability exists due to double-locking error in drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c. An authenticated local user can exploit this vulnerability to perform a read-after-free attack against TIOCGSID and gain access to sensitive information.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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) Unchecked Return Value

EUVDB-ID: #VU56816

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-2020-29569

CWE-ID: CWE-252 - Unchecked Return Value

Exploit availability: No

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to an unchecked return value. A local user can cause a denial of service (DoS) condition, leading to privilege escalation and information leaks.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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: #VU49169

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27815

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

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 condition in fs/jfs/jfs_dmap.c. A local user can trigger out-of-bounds read error and crash the kernel.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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) Null pointer dereference

EUVDB-ID: #VU95192

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-2020-27830

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.

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

python3-perf-debuginfo: before 4.19.90-2101.1.0.0055

python3-perf: before 4.19.90-2101.1.0.0055

python2-perf-debuginfo: before 4.19.90-2101.1.0.0055

python2-perf: before 4.19.90-2101.1.0.0055

perf-debuginfo: before 4.19.90-2101.1.0.0055

perf: before 4.19.90-2101.1.0.0055

kernel-tools-devel: before 4.19.90-2101.1.0.0055

kernel-tools-debuginfo: before 4.19.90-2101.1.0.0055

kernel-tools: before 4.19.90-2101.1.0.0055

kernel-source: before 4.19.90-2101.1.0.0055

kernel-devel: before 4.19.90-2101.1.0.0055

kernel-debugsource: before 4.19.90-2101.1.0.0055

kernel-debuginfo: before 4.19.90-2101.1.0.0055

bpftool-debuginfo: before 4.19.90-2101.1.0.0055

bpftool: before 4.19.90-2101.1.0.0055

kernel: before 4.19.90-2101.1.0.0055

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1003


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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