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CVE-2017-5383· NVD / CVE Program· CNA mozilla

URLs containing certain unicode glyphs for alternative hyphens and quotes do not properly trigger punycode display, allowing for domain name

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.4% (FIRST EPSS); higher than 83.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: firefox-esr (Debian:12) 45.7.0esr-1; firefox-esr (Debian:7) 45.7.0esr-1~deb7u1; icedove (Debian:7) 1:45.8.0-3~deb7u1.

Low priority for now. Upgrade to firefox-esr (Debian:12) 45.7.0esr-1; firefox-esr (Debian:7) 45.7.0esr-1~deb7u1; icedove (Debian:7) 1:45.8.0-3~deb7u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

URLs containing certain unicode glyphs for alternative hyphens and quotes do not properly trigger punycode display, allowing for domain name spoofing attacks in the location bar. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

MediumCVSS 5.3 · v3.0—No exploit Fix available
Published
Jun 11, 2018
Updated
Jun 16, 2026
EPSS
2.5% · 84th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.5%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
debiandebian linux
redhatenterprise linux
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux server eus
redhatenterprise linux workstation
mozillathunderbird
mozillafirefox

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux8.0
  • mozilla firefoxbefore 45.7.0
  • mozilla firefoxbefore 51.0
  • mozilla thunderbirdbefore 45.7.0
  • redhat enterprise linux5.0
  • redhat enterprise linux6.0
  • redhat enterprise linux7.0
  • redhat enterprise linux desktop5.0
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux desktop7.0
  • redhat enterprise linux server5.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux server7.0
  • redhat enterprise linux server aus7.3
  • redhat enterprise linux server aus7.4
  • redhat enterprise linux server eus7.3
  • redhat enterprise linux server eus7.4
  • redhat enterprise linux server eus7.5
  • redhat enterprise linux workstation5.0
  • redhat enterprise linux workstation6.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.

  • Mozilla Firefox

    • unspecified and later · before 51affected

  • Mozilla Firefox ESR

    • unspecified and later · before 45.7affected

  • Mozilla Thunderbird

    • unspecified and later · before 45.7affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12firefox-esrbefore 45.7.0esr-145.7.0esr-1
Debian:7firefox-esrbefore 45.7.0esr-1~deb7u145.7.0esr-1~deb7u1
Debian:7icedovebefore 1:45.8.0-3~deb7u11:45.8.0-3~deb7u1
Debian:8firefox-esrbefore 45.7.0esr-1~deb8u145.7.0esr-1~deb8u1
Debian:8icedovebefore 1:45.8.0-3~deb8u11:45.8.0-3~deb8u1
Red Hat:enterprise_linux:5::clientfirefoxbefore 0:45.7.0-2.el5_110:45.7.0-2.el5_11
Red Hat:enterprise_linux:5::clientfirefox-debuginfobefore 0:45.7.0-2.el5_110:45.7.0-2.el5_11
Red Hat:enterprise_linux:5::clientthunderbirdbefore 0:45.7.0-1.el5_110:45.7.0-1.el5_11
Red Hat:enterprise_linux:5::clientthunderbird-debuginfobefore 0:45.7.0-1.el5_110:45.7.0-1.el5_11
Red Hat:enterprise_linux:6::clientfirefoxbefore 0:45.7.0-2.el6_80:45.7.0-2.el6_8
Red Hat:enterprise_linux:6::clientfirefox-debuginfobefore 0:45.7.0-2.el6_80:45.7.0-2.el6_8
Red Hat:enterprise_linux:6::clientthunderbirdbefore 0:45.7.0-1.el6_80:45.7.0-1.el6_8
Red Hat:enterprise_linux:6::clientthunderbird-debuginfobefore 0:45.7.0-1.el6_80:45.7.0-1.el6_8
Red Hat:enterprise_linux:7::clientfirefoxbefore 0:45.7.0-2.el7_30:45.7.0-2.el7_3
Red Hat:enterprise_linux:7::clientfirefox-debuginfobefore 0:45.7.0-2.el7_30:45.7.0-2.el7_3
Red Hat:enterprise_linux:7::clientthunderbirdbefore 0:45.7.0-1.el7_30:45.7.0-1.el7_3
Red Hat:enterprise_linux:7::clientthunderbird-debuginfobefore 0:45.7.0-1.el7_30:45.7.0-1.el7_3
SUSE:Linux Enterprise Desktop 12 SP1MozillaFirefoxbefore 45.7.0esr-99.145.7.0esr-99.1
SUSE:Linux Enterprise Software Development Kit 11 SP4MozillaFirefoxbefore 45.7.0esr-65.245.7.0esr-65.2
SUSE:Package Hub 12MozillaThunderbirdbefore 45.7.0-23.145.7.0-23.1

Same product

debian: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-9079A use-after-free vulnerability in SVG Animation has been discovered.KEV
    86Now
  • CVE-2024-44308The issue was addressed with improved checks.KEV
    68This week
  • CVE-2021-25216A second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack
    64This week
  • CVE-2024-44309A cookie management issue was addressed with improved state management.KEV
    62This week
  • CVE-2016-2098Action Pack in Ruby on Rails before 3.2.22.2, 4.x before 4.1.14.2, and 4.2.x before 4.2.5.2 allows remote attackers to execute arbitrary Rub
    53Plan
  • CVE-2015-1592Movable Type Pro, Open Source, and Advanced before 5.2.12 and Pro and Advanced 6.0.x before 6.0.7 does not properly use the Perl Storable::t
    52Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:firefox-esr45.7.0esr-1 · Debian:12Package registry (OSV)
debian:icedove1:45.8.0-3~deb7u1 · Debian:7Package registry (OSV)
red hat:firefox0:45.7.0-2.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:firefox-debuginfo0:45.7.0-2.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:thunderbird0:45.7.0-1.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:thunderbird-debuginfo0:45.7.0-1.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
suse:MozillaFirefox45.7.0esr-65.2 · SUSE:Linux Enterprise Software Development Kit 11 SP4Package registry (OSV)
suse:MozillaThunderbird45.7.0-23.1 · SUSE:Package Hub 12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (12 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records