openEuler update for kernel



Risk Medium
Patch available YES
Number of vulnerabilities 7
CVE-ID CVE-2021-26931
CVE-2021-26930
CVE-2021-26932
CVE-2021-28038
CVE-2021-27363
CVE-2021-27364
CVE-2021-27365
CWE-ID CWE-770
CWE-399
CWE-119
CWE-200
CWE-264
Exploitation vector Network
Public exploit N/A
Vulnerable software
 openEuler
Operating systems & Components / Operating system

perf
Operating systems & Components / Operating system package or component

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

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

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

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

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

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

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

bpftool
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

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

kernel-devel
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

kernel
Operating systems & Components / Operating system package or component

Vendor openEuler

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Allocation of resources without limits or throttling

EUVDB-ID: #VU92418

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-2021-26931

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

Description

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

The vulnerability exists due to allocation of resources without limits or throttling error within the scsiback_gnttab_data_map_batch() function in drivers/xen/xen-scsiback.c. A local user can 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

perf: before 4.19.90-2103.3.0.0061

kernel-tools: before 4.19.90-2103.3.0.0061

perf-debuginfo: before 4.19.90-2103.3.0.0061

kernel-debugsource: before 4.19.90-2103.3.0.0061

python2-perf-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf-debuginfo: before 4.19.90-2103.3.0.0061

python2-perf: before 4.19.90-2103.3.0.0061

kernel-source: before 4.19.90-2103.3.0.0061

bpftool: before 4.19.90-2103.3.0.0061

kernel-tools-devel: before 4.19.90-2103.3.0.0061

kernel-tools-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf: before 4.19.90-2103.3.0.0061

kernel-devel: before 4.19.90-2103.3.0.0061

kernel-debuginfo: before 4.19.90-2103.3.0.0061

bpftool-debuginfo: before 4.19.90-2103.3.0.0061

kernel: before 4.19.90-2103.3.0.0061

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1111


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 management error

EUVDB-ID: #VU51587

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-26930

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources when processing service requests to the PV backend within drivers/block/xen-blkback/blkback.c driver in Xen. A local user on the guest OS can 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

perf: before 4.19.90-2103.3.0.0061

kernel-tools: before 4.19.90-2103.3.0.0061

perf-debuginfo: before 4.19.90-2103.3.0.0061

kernel-debugsource: before 4.19.90-2103.3.0.0061

python2-perf-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf-debuginfo: before 4.19.90-2103.3.0.0061

python2-perf: before 4.19.90-2103.3.0.0061

kernel-source: before 4.19.90-2103.3.0.0061

bpftool: before 4.19.90-2103.3.0.0061

kernel-tools-devel: before 4.19.90-2103.3.0.0061

kernel-tools-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf: before 4.19.90-2103.3.0.0061

kernel-devel: before 4.19.90-2103.3.0.0061

kernel-debuginfo: before 4.19.90-2103.3.0.0061

bpftool-debuginfo: before 4.19.90-2103.3.0.0061

kernel: before 4.19.90-2103.3.0.0061

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1111


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Buffer overflow

EUVDB-ID: #VU93670

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-2021-26932

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to memory corruption within the gntdev_map_grant_pages() function in drivers/xen/gntdev.c. A local user can 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

perf: before 4.19.90-2103.3.0.0061

kernel-tools: before 4.19.90-2103.3.0.0061

perf-debuginfo: before 4.19.90-2103.3.0.0061

kernel-debugsource: before 4.19.90-2103.3.0.0061

python2-perf-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf-debuginfo: before 4.19.90-2103.3.0.0061

python2-perf: before 4.19.90-2103.3.0.0061

kernel-source: before 4.19.90-2103.3.0.0061

bpftool: before 4.19.90-2103.3.0.0061

kernel-tools-devel: before 4.19.90-2103.3.0.0061

kernel-tools-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf: before 4.19.90-2103.3.0.0061

kernel-devel: before 4.19.90-2103.3.0.0061

kernel-debuginfo: before 4.19.90-2103.3.0.0061

bpftool-debuginfo: before 4.19.90-2103.3.0.0061

kernel: before 4.19.90-2103.3.0.0061

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1111


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) Allocation of resources without limits or throttling

EUVDB-ID: #VU92417

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-2021-28038

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

Description

The vulnerability allows a local user to a crash the entire system.

The vulnerability exists due to allocation of resources without limits or throttling error within the xenvif_tx_action() function in drivers/net/xen-netback/netback.c. A local user can a crash the entire system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

perf: before 4.19.90-2103.3.0.0061

kernel-tools: before 4.19.90-2103.3.0.0061

perf-debuginfo: before 4.19.90-2103.3.0.0061

kernel-debugsource: before 4.19.90-2103.3.0.0061

python2-perf-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf-debuginfo: before 4.19.90-2103.3.0.0061

python2-perf: before 4.19.90-2103.3.0.0061

kernel-source: before 4.19.90-2103.3.0.0061

bpftool: before 4.19.90-2103.3.0.0061

kernel-tools-devel: before 4.19.90-2103.3.0.0061

kernel-tools-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf: before 4.19.90-2103.3.0.0061

kernel-devel: before 4.19.90-2103.3.0.0061

kernel-debuginfo: before 4.19.90-2103.3.0.0061

bpftool-debuginfo: before 4.19.90-2103.3.0.0061

kernel: before 4.19.90-2103.3.0.0061

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1111


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) Information disclosure

EUVDB-ID: #VU51453

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-2021-27363

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 the show_transport_handle() shows iSCSI transport handle to non-root users. A local user can gain unauthorized access to sensitive information and use it along with another vulnerability, such as #VU51452, to escalate privileges on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

perf: before 4.19.90-2103.3.0.0061

kernel-tools: before 4.19.90-2103.3.0.0061

perf-debuginfo: before 4.19.90-2103.3.0.0061

kernel-debugsource: before 4.19.90-2103.3.0.0061

python2-perf-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf-debuginfo: before 4.19.90-2103.3.0.0061

python2-perf: before 4.19.90-2103.3.0.0061

kernel-source: before 4.19.90-2103.3.0.0061

bpftool: before 4.19.90-2103.3.0.0061

kernel-tools-devel: before 4.19.90-2103.3.0.0061

kernel-tools-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf: before 4.19.90-2103.3.0.0061

kernel-devel: before 4.19.90-2103.3.0.0061

kernel-debuginfo: before 4.19.90-2103.3.0.0061

bpftool-debuginfo: before 4.19.90-2103.3.0.0061

kernel: before 4.19.90-2103.3.0.0061

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1111


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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU51452

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-2021-27364

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

Exploit availability: No

Description

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

The vulnerability exists due to iscsi_if_recv_msg() allows non-root users to connect and send commands to the Linux kernel. A local user can escalate privileges on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

perf: before 4.19.90-2103.3.0.0061

kernel-tools: before 4.19.90-2103.3.0.0061

perf-debuginfo: before 4.19.90-2103.3.0.0061

kernel-debugsource: before 4.19.90-2103.3.0.0061

python2-perf-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf-debuginfo: before 4.19.90-2103.3.0.0061

python2-perf: before 4.19.90-2103.3.0.0061

kernel-source: before 4.19.90-2103.3.0.0061

bpftool: before 4.19.90-2103.3.0.0061

kernel-tools-devel: before 4.19.90-2103.3.0.0061

kernel-tools-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf: before 4.19.90-2103.3.0.0061

kernel-devel: before 4.19.90-2103.3.0.0061

kernel-debuginfo: before 4.19.90-2103.3.0.0061

bpftool-debuginfo: before 4.19.90-2103.3.0.0061

kernel: before 4.19.90-2103.3.0.0061

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1111


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) Buffer overflow

EUVDB-ID: #VU51451

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-2021-27365

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing Netlink messages in Linux kernel through 5.11.3, as certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. A local unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message, trigger memory corruption and execute arbitrary code on the system with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

perf: before 4.19.90-2103.3.0.0061

kernel-tools: before 4.19.90-2103.3.0.0061

perf-debuginfo: before 4.19.90-2103.3.0.0061

kernel-debugsource: before 4.19.90-2103.3.0.0061

python2-perf-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf-debuginfo: before 4.19.90-2103.3.0.0061

python2-perf: before 4.19.90-2103.3.0.0061

kernel-source: before 4.19.90-2103.3.0.0061

bpftool: before 4.19.90-2103.3.0.0061

kernel-tools-devel: before 4.19.90-2103.3.0.0061

kernel-tools-debuginfo: before 4.19.90-2103.3.0.0061

python3-perf: before 4.19.90-2103.3.0.0061

kernel-devel: before 4.19.90-2103.3.0.0061

kernel-debuginfo: before 4.19.90-2103.3.0.0061

bpftool-debuginfo: before 4.19.90-2103.3.0.0061

kernel: before 4.19.90-2103.3.0.0061

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1111


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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