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Alpine Linux: CVE-2023-32683: Incorrect Authorization

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Alpine Linux: CVE-2023-32683: Incorrect Authorization

Severity
5
CVSS
(AV:N/AC:L/Au:S/C:P/I:P/A:N)
Published
06/06/2023
Created
08/23/2024
Added
08/22/2024
Modified
10/02/2024

Description

Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.

Solution(s)

  • alpine-linux-upgrade-synapse

References

  • https://attackerkb.com/topics/cve-2023-32683
  • CVE - 2023-32683
  • https://security.alpinelinux.org/vuln/CVE-2023-32683
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