// For flags

CVE-2017-7807

Mozilla: Domain hijacking through appcache fallback (MFSA 2017-19)

Severity Score

8.1
*CVSS v3

Exploit Likelihood

< 1%
*EPSS

Affected Versions

18
*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A mechanism that uses AppCache to hijack a URL in a domain using fallback by serving the files from a sub-path on the domain. This has been addressed by requiring fallback files be inside the manifest directory. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Un mecanismo que utiliza AppCache para secuestrar una URL en un dominio utilizando fallback sirviendo los archivos desde una subruta en el dominio. Esto se ha solucionado al requerir que los archivos fallback estén dentro del directorio manifest. Esta vulnerabilidad afecta a las versiones anteriores a la 52.3 de Thunderbird, las versiones anteriores a la 52.3 de Firefox ESR y las versiones anteriores a la 55 de Firefox.

USN-3391-1 fixed vulnerabilities in Firefox. The update introduced a performance regression with WebExtensions. This update fixes the problem. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to conduct cross-site scripting attacks, bypass sandbox restrictions, obtain sensitive information, spoof the origin of modal alerts, bypass same origin restrictions, read uninitialized memory, cause a denial of service via program crash or hang, or execute arbitrary code. Various other issues were also addressed.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
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
  • 2017-08-10 CVE Published
  • 2024-08-05 CVE Updated
  • 2024-08-05 First Exploit
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-20: Improper Input Validation
  • CWE-829: Inclusion of Functionality from Untrusted Control Sphere
CAPEC
Affected Vendors, Products, and Versions (18)