Red Hat Enterprise Linux 7.6 update for libldb



Published: 2021-07-22
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-20277
CWE ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
Red Hat Enterprise Linux Server - Update Services for SAP Solutions
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions
Operating systems & Components / Operating system package or component

libldb (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server - TUS
Operating systems & Components / Operating system

Red Hat Enterprise Linux Server - AUS
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Out-of-bounds read

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-20277

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition in ldb_handler_fold() function when processing multiple consecutive leading spaces within LDAP query. A remote user can send a specially crafted LDAP query, trigger out-of-bounds read error and crash the LDAP server.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server - TUS: 7.6

Red Hat Enterprise Linux Server - AUS: 7.6

libldb (Red Hat package): 1.3.4-1.el7

CPE External links

https://access.redhat.com/errata/RHSA-2021:2786

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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



###SIDEBAR###