Red Hat Enterprise Linux 8 update for evolution

1) NULL pointer dereference

EUVDB-ID: #VU45886

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-2020-16117

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in GNOME evolution-data-server before 3.35.91, a malicious server can crash the mail client with a NULL pointer dereference by sending an invalid (e.g., minimal) CAPABILITY line on a connection attempt. This is related to imapx_free_capability and imapx_connect_to_server. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

evolution-data-server (Red Hat package): 3.28.5-11.el8 - 3.28.5-14.el8

evolution (Red Hat package): 3.28.5-9.el8 - 3.28.5-14.el8

evolution-ews (Red Hat package): 3.28.5-5.el8 - 3.28.5-9.el8

Red Hat CodeReady Linux Builder for ARM 64: 8.0

Red Hat CodeReady Linux Builder for Power, little endian: 8.0

Red Hat CodeReady Linux Builder for x86_64: 8.0

Red Hat Enterprise Linux for ARM 64: 8

Red Hat Enterprise Linux for Power, little endian: 8

Red Hat Enterprise Linux for IBM z Systems: 8

Red Hat Enterprise Linux for x86_64: 8.0

CPE2.3

• cpe:2.3:a:red_hat:evolution-data-server_redhat_package:3.28.5-11.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:evolution-data-server_redhat_package:3.28.5-13.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:evolution-data-server_redhat_package:3.28.5-14.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:evolution_redhat_package:3.28.5-9.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:evolution_redhat_package:3.28.5-12.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:evolution_redhat_package:3.28.5-14.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:evolution-ews_redhat_package:3.28.5-5.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:evolution-ews_redhat_package:3.28.5-9.el8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_codeready_linux_builder_for_arm_64:8.0:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_codeready_linux_builder_for_x86_64:8.0:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_arm_64:8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_little_endian:8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_ibm_z_systems:8:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux:8.0:*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2021:1752

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.