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Vulnerability details: VCID-3hgg-t18h-wqdu
Vulnerability ID VCID-3hgg-t18h-wqdu
Aliases CVE-2018-12393
Summary A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. *Note: 64-bit builds are not vulnerable to this issue.*
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-787 Out-of-bounds Write
CWE-190 Integer Overflow or Wraparound
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12393.json
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
epss 0.02845 https://api.first.org/data/v1/epss?cve=CVE-2018-12393
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-12393
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-12393
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-26
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-27
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-28
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2018:3005
https://access.redhat.com/errata/RHSA-2018:3006
https://access.redhat.com/errata/RHSA-2018:3531
https://access.redhat.com/errata/RHSA-2018:3532
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12393.json
https://api.first.org/data/v1/epss?cve=CVE-2018-12393
https://bugzilla.mozilla.org/show_bug.cgi?id=1495011
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12389
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12390
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12392
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12393
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12395
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12396
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12397
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html
https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
https://security.gentoo.org/glsa/201811-04
https://security.gentoo.org/glsa/201811-13
https://www.debian.org/security/2018/dsa-4324
https://www.debian.org/security/2018/dsa-4337
https://www.mozilla.org/security/advisories/mfsa2018-26/
https://www.mozilla.org/security/advisories/mfsa2018-27/
https://www.mozilla.org/security/advisories/mfsa2018-28/
http://www.securityfocus.com/bid/105718
http://www.securityfocus.com/bid/105769
http://www.securitytracker.com/id/1041944
1642183 https://bugzilla.redhat.com/show_bug.cgi?id=1642183
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:x86:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:x86:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:x86:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:x86:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:x86:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:x86:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
CVE-2018-12393 https://nvd.nist.gov/vuln/detail/CVE-2018-12393
mfsa2018-26 https://www.mozilla.org/en-US/security/advisories/mfsa2018-26
mfsa2018-27 https://www.mozilla.org/en-US/security/advisories/mfsa2018-27
mfsa2018-28 https://www.mozilla.org/en-US/security/advisories/mfsa2018-28
USN-3801-1 https://usn.ubuntu.com/3801-1/
USN-3868-1 https://usn.ubuntu.com/3868-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12393.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:R/S:U/C:H/I:H/A:H 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:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12393
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12393
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 0.85688
EPSS Score 0.02845
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:54.082275+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2018/mfsa2018-28.yml 37.0.0