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Vulnerability details: VCID-83kk-gd67-aaag
Vulnerability ID VCID-83kk-gd67-aaag
Aliases CVE-2018-12384
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 7.0
Risk 3.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-335 Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-12384.html
rhas Moderate https://access.redhat.com/errata/RHSA-2018:2768
rhas Moderate https://access.redhat.com/errata/RHSA-2018:2898
cvssv3 4.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12384.json
epss 0.00572 https://api.first.org/data/v1/epss?cve=CVE-2018-12384
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epss 0.00577 https://api.first.org/data/v1/epss?cve=CVE-2018-12384
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rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1622089
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12384
generic_textual Low https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.36.5_release_notes
generic_textual Low https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.39_release_notes
cvssv3 4.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-12384
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2018-12384
generic_textual Medium https://ubuntu.com/security/notices/USN-3850-1
generic_textual Medium https://ubuntu.com/security/notices/USN-3850-2
cvssv3.1 9.8 https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
generic_textual CRITICAL https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-12384.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12384.json
https://api.first.org/data/v1/epss?cve=CVE-2018-12384
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12384
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12384
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.36.5_release_notes
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.39_release_notes
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://ubuntu.com/security/notices/USN-3850-1
https://ubuntu.com/security/notices/USN-3850-2
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
1622089 https://bugzilla.redhat.com/show_bug.cgi?id=1622089
908332 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908332
cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
CVE-2018-12384 https://nvd.nist.gov/vuln/detail/CVE-2018-12384
RHSA-2018:2768 https://access.redhat.com/errata/RHSA-2018:2768
RHSA-2018:2898 https://access.redhat.com/errata/RHSA-2018:2898
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12384.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12384
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12384
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.67374
EPSS Score 0.00572
Published At April 29, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.