Vulnerability in Mozilla Network Security Services
CVE-2018-12384
When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new random value but sends an all-zero value instead. This results in full malleability of the ClientHello for SSLv2 used for TLS 1.2 in all versions prior to NSS 3.39. This does not impact TLS 1.3.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: -0.000
Affected products
- Mozilla Network Security Services
- Nss Network Security Services (Nss) — versions All versions prior to NSS 3.39
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
- www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Frequently asked questions
- What is CVE-2018-12384?
- CVE-2018-12384 is a medium-severity vulnerability in Mozilla Network Security Services, classified under Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG). CVSS score: 5.9/10. Published 2019-04-29.
- How severe is CVE-2018-12384?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2018-12384 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.