Mozilla Firefox up to 77.x AppCache default permission

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$5k-$25k0.00

A vulnerability classified as critical has been found in Mozilla Firefox up to 77.x (Web Browser). This affects an unknown part of the component AppCache. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-276. This is going to have an impact on integrity. The summary by CVE is:

When "%2F" was present in a manifest URL, Firefox's AppCache behavior may have become confused and allowed a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory. This vulnerability affects Firefox < 78.

The weakness was disclosed 07/09/2020 as Bug 1586630 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.mozilla.org. This vulnerability is uniquely identified as CVE-2020-12415 since 04/28/2020. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/10/2020).

Upgrading to version 78.0 eliminates this vulnerability.

The entries 157798, 157796, 157795 and 157794 are pretty similar.

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CVSSv3infoedit

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

CVSSv2infoedit

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-276
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 78.0

Timelineinfoedit

04/28/2020 CVE assigned
07/09/2020 +72 days Advisory disclosed
07/10/2020 +1 days VulDB entry created
07/10/2020 +0 days VulDB last update

Sourcesinfoedit

Vendor: https://www.mozilla.org/
Product: https://www.mozilla.org/en-US/firefox/

Advisory: Bug 1586630
Status: Not defined

CVE: CVE-2020-12415 (🔒)
See also: 🔒

Entryinfoedit

Created: 07/10/2020 08:36 AM
Updated: 07/10/2020 08:41 AM
Changes: (18) software_type vulnerability_cwe vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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