Ipa up to 4.6.6/4.7.3/4.8.2 Kerberos Key Data Parser ber_scanf resource consumption

Summaryinfo

A vulnerability was found in Ipa up to 4.6.6/4.7.3/4.8.2. It has been classified as critical. This affects the function ber_scanf of the component Kerberos Key Data Parser. Performing a manipulation results in resource consumption. This vulnerability is known as CVE-2019-14867. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Ipa up to 4.6.6/4.7.3/4.8.2. It has been classified as critical. This affects the function ber_scanf of the component Kerberos Key Data Parser. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in IPA, all 4.6.x versions before 4.6.7, all 4.7.x versions before 4.7.4 and all 4.8.x versions before 4.8.3, in the way the internal function ber_scanf() was used in some components of the IPA server, which parsed kerberos key data. An unauthenticated attacker who could trigger parsing of the krb principal key could cause the IPA server to crash or in some conditions, cause arbitrary code to be executed on the server hosting the IPA server.

The weakness was published 11/27/2019 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2019-14867 since 08/10/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 208558 (CentOS 7 : ipa (RHSA-2020:0378)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.6.7, 4.7.4 or 4.8.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208558). Similar entry is available at VDB-146444. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• Ipa

Version

• 4.6.0
• 4.6.1
• 4.6.2
• 4.6.3
• 4.6.4
• 4.6.5
• 4.6.6
• 4.7.0
• 4.7.1
• 4.7.2
• 4.7.3
• 4.8.0
• 4.8.1
• 4.8.2

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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