Mozilla Firefox 35 OpenType Sanitiser ots::ots_gasp_parse use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic was found in Mozilla Firefox 35 (Web Browser). Affected by this vulnerability is the function ots::ots_gasp_parse of the component OpenType Sanitiser. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality.

The weakness was shared 02/24/2015 by Atte Kettunen as MFSA 2015-23 as confirmed security advisory (Website). The advisory is shared at This vulnerability is known as CVE-2015-0823 since 01/07/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 81588 (FreeBSD : mozilla -- multiple vulnerabilities (99029172-8253-407d-9d8b-2cfeab9abf81)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167676 (OpenSuSE Security Update for seamonkey (openSUSE-SU-2015:0570-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (101102), Tenable (81588), SecurityFocus (BID 72754†), SecurityTracker (ID 1031791†) and Vulnerability Center (SBV-48779†).







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
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Class: Use after free
CWE: CWE-416 / CWE-119

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Nessus ID: 81588
Nessus Name: FreeBSD : mozilla -- multiple vulnerabilities (99029172-8253-407d-9d8b-2cfeab9abf81)
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OpenVAS ID: 803420
OpenVAS Name: Mozilla Firefox Multiple Vulnerabilities-01 Mar15 (Windows)
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Threat Intelligenceinfo

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Recommended: Upgrade
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01/07/2015 🔍
02/24/2015 +48 days 🔍
02/24/2015 +0 days 🔍
02/24/2015 +0 days 🔍
02/24/2015 +0 days 🔍
02/24/2015 +0 days 🔍
02/25/2015 +1 days 🔍
02/25/2015 +0 days 🔍
02/26/2015 +1 days 🔍
03/10/2022 +2569 days 🔍



Advisory: MFSA 2015-23
Researcher: Atte Kettunen
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-0823 (🔍)
X-Force: 101102 - Mozilla Firefox OTS information disclosure
SecurityFocus: 72754 - Mozilla Firefox CVE-2015-0823 Use After Free Denial of Service Vulnerability
SecurityTracker: 1031791 - Mozilla Firefox Multiple Flaws Let Remote Users Deny Service, Execute Arbitrary Code, Bypass Security Restrictions, and Obtain Potentially Sensitive Information and Let Local Users Gain Elevated Privileges
Vulnerability Center: 48779 - Mozilla Firefox <36.0 Remote DoS in Developer Console with OpenType Sanitiser (OTS), Low


Created: 02/26/2015 12:28 PM
Updated: 03/10/2022 08:51 PM
Changes: 02/26/2015 12:28 PM (75), 06/21/2017 10:47 AM (7), 03/10/2022 08:44 PM (4), 03/10/2022 08:51 PM (1)
Complete: 🔍
Cache ID: 44:DB9:40


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