Fedora dnf5daemon-server up to 5.1.16 Plugin Loader input validation

Summaryinfo

A vulnerability, which was classified as critical, was found in Fedora dnf5daemon-server up to 5.1.16. Affected is an unknown function of the component Plugin Loader. Executing a manipulation can lead to Local Privilege Escalation. This vulnerability is tracked as CVE-2024-2746. The attack is restricted to local execution. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Fedora dnf5daemon-server up to 5.1.16. It has been declared as critical. This vulnerability affects some unknown functionality of the component Plugin Loader. The manipulation with an unknown input leads to a local privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Incomplete fix for CVE-2024-1929 The problem with CVE-2024-1929 was that the dnf5 D-Bus daemon accepted arbitrary configuration parameters from unprivileged users, which allowed a local root exploit by tricking the daemon into loading a user controlled "plugin". All of this happened before Polkit authentication was even started. The dnf5 library code does not check whether non-root users control the directory in question.  On one hand, this poses a Denial-of-Service attack vector by making the daemonoperate on a blocking file (e.g. named FIFO special file) or a very large file that causes an out-of-memory situation (e.g. /dev/zero). On the other hand, this can be used to let the daemon process privileged files like /etc/shadow. The file in question is parsed as an INI file. Error diagnostics resulting from parsing privileged files could cause information leaks, if these diagnostics are accessible to unprivileged users. In the case of libdnf5, no such user accessible diagnostics should exist, though. Also, a local attacker can place a valid repository configuration file in this directory. This configuration file allows to specify a plethora of additional configuration options. This makes various additional code paths in libdnf5 accessible to the attacker. 

The advisory is available at openwall.com. This vulnerability was named CVE-2024-2746 since 03/20/2024. The exploitation appears to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Fedora

Name

• dnf5daemon-server

Version

• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5
• 5.1.6
• 5.1.7
• 5.1.8
• 5.1.9
• 5.1.10
• 5.1.11
• 5.1.12
• 5.1.13
• 5.1.14
• 5.1.15
• 5.1.16

CPE 2.3info

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CPE 2.2info

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Entryinfo

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