EulerOS Virtualization 2.5.3 : libssh2 (EulerOS-SA-2019-1360)

critical Nessus Plugin ID 124738
New! Plugin Severity Now Using CVSS v3

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Synopsis

The remote EulerOS Virtualization host is missing multiple security updates.

Description

According to the versions of the libssh2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

- An out of bounds read flaw was discovered in libssh2 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3858)

- An out of bounds read flaw was discovered in libssh2 in the _libssh2_packet_require and
_libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3859)

- An out of bounds read flaw was discovered in libssh2 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3860)

- An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3861)

- An out of bounds read flaw was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3862)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libssh2 packages.

See Also

http://www.nessus.org/u?c59aee8f

Plugin Details

Severity: Critical

ID: 124738

File Name: EulerOS_SA-2019-1360.nasl

Version: 1.6

Type: local

Published: 5/10/2019

Updated: 1/6/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:libssh2, cpe:/o:huawei:euleros:uvp:2.5.3

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 5/5/2019

Reference Information

CVE: CVE-2019-3858, CVE-2019-3859, CVE-2019-3860, CVE-2019-3861, CVE-2019-3862