Resource exhaustion in Mozilla Network Security Services
CVE-2020-25648
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.039 (89.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- Mozilla Network Security Services
- Oracle Communications Offline Mediation Controller — versions 12.0.0.3.0
- Oracle Communications Pricing Design Center — versions 12.0.0.3.0
- Oracle Jd Edwards Enterpriseone Tools
- Fedoraproject Fedora — versions 31, 32, 33
- Red Hat Enterprise Linux — versions 7.0, 8.0
- Nss — versions nss versions before 3.58
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notes (Release Notes, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac… (mailing-list)
- www.oracle.com//security-alerts/cpujul2021.html (Patch, Third Party Advisory)
- www.oracle.com/security-alerts/cpuoct2021.html (Patch, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Third Party Advisory, Not Applicable)
- lists.debian.org/debian-lts-announce/2023/10/msg00039.html (mailing-list)
Frequently asked questions
- What is CVE-2020-25648?
- CVE-2020-25648 is a high-severity vulnerability in Mozilla Network Security Services, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2020-10-20.
- How severe is CVE-2020-25648?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-25648 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.