CVE-2017-7764
Characters from the "Canadian Syllabics" unicode block can be mixed with characters from other unicode blocks in the addressbar instead of being rendered as their raw "punycode" form, allowing for
02 Description
Characters from the "Canadian Syllabics" unicode block can be mixed with characters from other unicode blocks in the addressbar instead of being rendered as their raw "punycode" form, allowing for
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.96% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 80.0% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-06-11 21:00Z8 YR AGO
- Last updated
- 2024-08-05 16:12Z2 YR AGO
- Reserved
- 2017-04-12
- Assigning CNA
- mozilla
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- f80e320edca364af268bf22403d8ac95e6d528e970cba1de7dc6e6d19939d7dd
05 Affected products
06 References
- www.securityfocus.com99057http://www.securityfocus.com/bid/99057
- www.unicode.orghttp://www.unicode.org/reports/tr31/tr31-26.html#Aspirational_Use_Scripts
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-15/
- www.debian.orgDSA-3918https://www.debian.org/security/2017/dsa-3918
- www.securitytracker.com1038689http://www.securitytracker.com/id/1038689
- bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1364283
- www.debian.orgDSA-3881https://www.debian.org/security/2017/dsa-3881
- access.redhat.comRHSA-2017:1440https://access.redhat.com/errata/RHSA-2017:1440
- access.redhat.comRHSA-2017:1561https://access.redhat.com/errata/RHSA-2017:1561
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-17/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-16/
07 Fixed in
Arch Linux
- firefox Fixed in 54.0-1
- thunderbird Fixed in 52.2.0-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- firefox-esr Fixed in 52.2.0esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- firefox-esr Fixed in 52.2.0esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- firefox-esr Fixed in 52.2.0esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- firefox Fixed in 54.0+build3-0ubuntu0.14.04.1
- thunderbird Fixed in 1:52.2.1+build1-0ubuntu0.14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- firefox Fixed in 54.0+build3-0ubuntu0.16.04.1
- thunderbird Fixed in 1:52.2.1+build1-0ubuntu0.16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.