Red Hat Enterprise Linux 8.8 Extended Update Support update for c-ares

1) Out-of-bounds read

EUVDB-ID: #VU83485

Risk: Medium

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

CVE-ID: CVE-2020-22217

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the ares_parse_soa_reply() function in ares_parse_soa_reply.c. A remote attacker can trigger an out-of-bounds read error and crash the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for ARM 64 - Extended Update Support: 8.8

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 8.8

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 8.8

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.8

c-ares (Red Hat package): before 1.13.0-6.el8_8.4

CPE2.3

• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_arm_64_-_extended_update_support:8.8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_little_endian_-_extended_update_support:8.8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_ibm_z_systems_-_extended_update_support:8.8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_x86_64_-_extended_update_support:8.8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:c-ares_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2024:0578

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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