Mozilla Firefox up to 53.0.3 Graphite2 Library getClassGlyph out-of-bounds read

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CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 53.0.3 (Web Browser). Affected is the function graphite2::Silf::getClassGlyph of the component Graphite2 Library. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-125. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 06/13/2017. The weakness was disclosed 04/15/2019 as MFSA 2017-15 as confirmed security advisory (Website). The advisory is shared for download at mozilla.org. This vulnerability is traded as CVE-2017-7776 since 04/12/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 101011 (Debian DSA-3894-1 : graphite2 - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176060 (Debian Security Update for firefox-esr (DSA 3881-1)).

Upgrading to version 54.0 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (101011). The entries 102487, 102488, 102489 and 102490 are pretty similar.

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VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2infoedit

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VulDB Base Score: 🔍
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Exploitinginfoedit

Class: Information disclosure
CWE: CWE-125
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 101011
Nessus Name: Debian DSA-3894-1 : graphite2 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for graphite2 CESA-2017:1793 centos7
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 54.0

Timelineinfoedit

04/12/2017 🔍
06/13/2017 +62 days 🔍
06/22/2017 +9 days 🔍
06/23/2017 +1 days 🔍
04/15/2019 +661 days 🔍
04/16/2019 +1 days 🔍
05/29/2020 +409 days 🔍

Sourcesinfoedit

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

Advisory: MFSA 2017-15
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7776 (🔍)
OVAL: 🔍
See also: 🔍

Entryinfoedit

Created: 04/16/2019 10:17 AM
Updated: 05/29/2020 04:46 PM
Changes: (2) vulnerability_discoverydate advisory_confirm_url
Complete: 🔍

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