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CVE-2021-43820

HIGH
7.4

Description

Seafile is an open source cloud storage system. A sync token is used in Seafile file syncing protocol to authorize access to library data. To improve performance, the token is cached in memory in seaf-server. Upon receiving a token from sync client or SeaDrive client, the server checks whether the token exist in the cache. However, if the token exists in cache, the server doesn't check whether it's associated with the specific library in the URL. This vulnerability makes it possible to use any valid sync token to access data from any **known** library. Note that the attacker has to first find out the ID of a library which it has no access to. The library ID is a random UUID, which is not possible to be guessed. There are no workarounds for this issue.

CVE Details

CVSS v3.1 Score7.4
SeverityHIGH
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack VectorNETWORK
ComplexityHIGH
Privileges RequiredNONE
User InteractionNONE
Published12/14/2021
Last Modified11/21/2024
Sourcenvd
Honeypot Sightings0

Affected Products

seafile:seafile_server

Weaknesses (CWE)

CWE-639

References

https://github.com/haiwen/seafile-server/pull/520(security-advisories@github.com)
https://github.com/haiwen/seafile-server/security/advisories/GHSA-m3wc-jv6r-hvv8(security-advisories@github.com)
https://github.com/haiwen/seafile-server/pull/520(af854a3a-2127-422b-91ae-364da2661108)
https://github.com/haiwen/seafile-server/security/advisories/GHSA-m3wc-jv6r-hvv8(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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