CentOS 7 update for kernel

1) Resource management error

EUVDB-ID: #VU21057

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-11487

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 a reference count overflow in page->_refcount that leads to a use-after-free error on systems with more than 140 GiB of RAM. A local user can send specially crafted FUSE requests that may lead to denial of service conditions.

The vulnerability is related to code in fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c files.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

CPE2.3

• cpe:2.3:o:centos_project:centos:7:*:*:*:*:*:*:*

External links

https://lists.centos.org/pipermail/centos-announce/2020-March/035660.html

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) Buffer overflow

EUVDB-ID: #VU22595

Risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-17666

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the P2P (Wifi-Direct) functionality in rtl_p2p_noa_ie() function in drivers/net/wireless/realtek/rtlwifi/ps.c in Linux kernel when processing Notice and Absence frames. A remote attacker can send specially crafted data via the wireless network, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

CPE2.3

• cpe:2.3:o:centos_project:centos:7:*:*:*:*:*:*:*

External links

https://lists.centos.org/pipermail/centos-announce/2020-March/035660.html

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.

3) Resource management error

EUVDB-ID: #VU26406

Risk: Low

CVSSv4.0: 4.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-19338

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to incomplete fix for Transaction Asynchronous Abort (TAA) issue on certain Intel CPUs (CVE-2019-11135). A local user on a guest operating system can exploit this vulnerability to gain access to sensitive information.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

CPE2.3

• cpe:2.3:o:centos_project:centos:7:*:*:*:*:*:*:*

External links

https://lists.centos.org/pipermail/centos-announce/2020-March/035660.html

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.