Medium severity · published Nov 9, 2020
CVE-2020-8150
A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files
4.1
CVSS
0.3%
EPSS
No
On KEV
Description
A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 19.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8150
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8150
Mailing List
http://seclists.org/fulldisclosure/2020/Dec/55
Mailing List
http://seclists.org/fulldisclosure/2020/Dec/57
Mailing List
http://seclists.org/fulldisclosure/2020/Dec/58
Exploit
https://hackerone.com/reports/742588
Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-039
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