Nextcloud Server up to 24.0.9/25.0.3 Favicon path traversal
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.9 | $0-$5k | 0.00 |
A vulnerability, which was classified as problematic, was found in Nextcloud Server up to 24.0.9/25.0.3 (Cloud Software). This affects some unknown processing of the component Favicon Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity, and availability. The summary by CVE is:
Nextcloud server is an open source home cloud implementation. In affected versions admins of a server were able to upload a logo or a favicon and to provided a file name which was not restricted and could overwrite files in the appdata directory. Administrators may have access to overwrite these files by other means but this method could be exploited by tricking an admin into uploading a maliciously named file. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. Users unable to upgrade should avoid ingesting logo files from untrusted sources.
The weakness was presented 03/31/2023 as GHSA-ch7f-px7m-hg25. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2023-28833 since 03/24/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.
Upgrading to version 24.0.10 or 25.0.4 eliminates this vulnerability. Applying a patch 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.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 4.9VulDB Meta Temp Score: 4.9
VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 8.8
NVD Vector: 🔍
CNA Base Score: 2.4
CNA Vector (GitHub, Inc.): 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Path traversalCWE: CWE-22
ATT&CK: T1006
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Server 24.0.10/25.0.4
Patch: github.com
Timeline
03/24/2023 🔍03/31/2023 🔍
03/31/2023 🔍
04/20/2023 🔍
Sources
Advisory: GHSA-ch7f-px7m-hg25Status: Confirmed
CVE: CVE-2023-28833 (🔍)
Entry
Created: 03/31/2023 09:06Updated: 04/20/2023 18:11
Changes: 03/31/2023 09:06 (53), 04/20/2023 18:11 (11)
Complete: 🔍
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