Ghost up to 5.59.0 content/ symlink

Summaryinfo

A vulnerability was found in Ghost up to 5.59.0. It has been declared as critical. Affected is an unknown function of the file content/. Such manipulation leads to symlink. This vulnerability is documented as CVE-2023-40028. The attack can be executed remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Ghost up to 5.59.0 and classified as problematic. Affected by this issue is some unknown processing of the file content/. The manipulation with an unknown input leads to a symlink vulnerability. Using CWE to declare the problem leads to CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. Impacted is confidentiality. CVE summarizes:

Ghost is an open source content management system. Versions prior to 5.59.1 are subject to a vulnerability which allows authenticated users to upload files that are symlinks. This can be exploited to perform an arbitrary file read of any file on the host operating system. Site administrators can check for exploitation of this issue by looking for unknown symlinks within Ghost's `content/` folder. Version 5.59.1 contains a fix for this issue. All users are advised to upgrade. There are no known workarounds for this vulnerability.

The weakness was released 08/15/2023 as GHSA-9c9v-w225-v5rg. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-40028 since 08/08/2023. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 5.59.1 eliminates this vulnerability. Applying the patch 690fbf3f7302ff3f77159c0795928bdd20f41205 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Exploit-DB (52409). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• Ghost

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.11
• 5.12
• 5.13
• 5.14
• 5.15
• 5.16
• 5.17
• 5.18
• 5.19
• 5.20
• 5.21
• 5.22
• 5.23
• 5.24
• 5.25
• 5.26
• 5.27
• 5.28
• 5.29
• 5.30
• 5.31
• 5.32
• 5.33
• 5.34
• 5.35
• 5.36
• 5.37
• 5.38
• 5.39
• 5.40
• 5.41
• 5.42
• 5.43
• 5.44
• 5.45
• 5.46
• 5.47
• 5.48
• 5.49
• 5.50
• 5.51
• 5.52
• 5.53
• 5.54
• 5.55
• 5.56
• 5.57
• 5.58
• 5.59.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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