Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-25217 |
CWE-ID | CWE-20 |
Exploitation vector | Local network |
Public exploit | N/A |
Vulnerable software Subscribe |
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) Operating systems & Components / Operating system Red Hat Enterprise Linux Server - Extended Life Cycle Support Operating systems & Components / Operating system dhcp (Red Hat package) Operating systems & Components / Operating system package or component |
Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU53609
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-25217
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack or gain access to sensitive information.
The vulnerability exists due to insufficient validation of options data stored in DHCP leases. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack or gain access to sensitive information.
Both dhcpd and dhclient are affected by the vulnerability.
Install updates from vendor's website.
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 6.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 6.0
dhcp (Red Hat package): 4.1.1-34.P1.el6
External linkshttp://access.redhat.com/errata/RHSA-2021:2419
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.