CVE-2017-7763

Severity Score

5.3

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Default fonts on OS X display some Tibetan characters as whitespace. When used in the addressbar as part of an IDN this can be used for domain name spoofing attacks. Note: This attack only affects OS X operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Las fuentes por defecto en OS X muestran algunos caracteres tibetanos como espacios en blanco. Cuando se emplean en la barra de direcciones como parte de un IDN, se pueden utilizar en ataques de suplantación de nombres de dominio. Nota: este ataque solo afecta a sistemas operativos OS X. Otros sistemas operativos no se han visto afectados. La vulnerabilidad afecta a Firefox en versiones anteriores a la 54, Firefox ESR en versiones anteriores a la 52.2 y Thunderbird en versiones anteriores a la 52.2.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-04-12 CVE Reserved
2018-06-11 CVE Published
2024-08-05 CVE Updated
2025-05-12 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (6)

URL	Tag	Source
http://www.securityfocus.com/bid/99057	Third Party Advisory
http://www.securitytracker.com/id/1038689	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://bugzilla.mozilla.org/show_bug.cgi?id=1360309	2018-08-14
https://www.mozilla.org/security/advisories/mfsa2017-15	2018-08-14
https://www.mozilla.org/security/advisories/mfsa2017-16	2018-08-14
https://www.mozilla.org/security/advisories/mfsa2017-17	2018-08-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"	Firefox Search vendor "Mozilla" for product "Firefox"	< 54.0 Search vendor "Mozilla" for product "Firefox" and version " < 54.0"	-	Affected	in	Apple Search vendor "Apple"	Mac Os X Search vendor "Apple" for product "Mac Os X"	-	-	Safe
Mozilla Search vendor "Mozilla"	Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"	< 52.2.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 52.2.0"	-	Affected	in	Apple Search vendor "Apple"	Mac Os X Search vendor "Apple" for product "Mac Os X"	-	-	Safe
Mozilla Search vendor "Mozilla"	Thunderbird Search vendor "Mozilla" for product "Thunderbird"	< 52.2.0 Search vendor "Mozilla" for product "Thunderbird" and version " < 52.2.0"	-	Affected	in	Apple Search vendor "Apple"	Mac Os X Search vendor "Apple" for product "Mac Os X"	-	-	Safe
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected