Vulnerability CVE-2020-25648
Published: 2020-10-20   Modified: 2020-10-21

Description:
A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.

Type:

CWE-770

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Redhat -> Enterprise linux 
Mozilla -> Network security services 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=1887319
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notes
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