Resource exhaustion in FreeIPA - CVE-2020-1722

Vulnerability identifier: #VU47198

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-1722

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to application does not properly control consumption of internal resources while trying to hash an overly long password string (more than 1 million characters). A remote attacker can send a specially crafted HTTP request, trigger resource exhaustion and perform a denial of service (DoS) attack.

FreeIPA
ipa (Red Hat package)
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64

Install updates from vendor's website.

FreeIPA - update to 4.8.1
ipa (Red Hat package) - update to 4.6.8-5.el7

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1722

• Denial of service in FreeIPA
• Red Hat Enterprise Linux 7 update for ipa
• Red Hat Enterprise Linux 8 update for the idm:DL1 and idm:client modules