Mozilla Firefox/Thunderbird 30.0 nsDocLoader::OnProgress 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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8.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Mozilla Firefox and Thunderbird 30.0. The impacted element is the function nsDocLoader::OnProgress. Executing a manipulation can lead to use after free. This vulnerability appears as CVE-2014-1555. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mozilla Firefox and Thunderbird 30.0 (Web Browser). It has been declared as critical. This vulnerability affects the function nsDocLoader::OnProgress. 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, integrity, and availability.

The weakness was presented 07/22/2014 by Jethro Beekman as MFSA2014-61 as confirmed advisory (Website). The advisory is shared for download at mozilla.org. This vulnerability was named CVE-2014-1555 since 01/16/2014. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/25/2025).

The vulnerability scanner Nessus provides a plugin with the ID 76687 (CentOS 5 / 6 : thunderbird (CESA-2014:0918)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 122381 (Red Hat Update for Xulrunner firefox (RHSA-2014:0919)).

Upgrading to version 31 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (94774), Tenable (76687), SecurityFocus (BID 68814†), Secunia (SA59591†) and SecurityTracker (ID 1030619†). Additional details are provided at bugzilla.mozilla.org. See VDB-67222, VDB-67223, VDB-67224 and VDB-67225 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 8.7

VulDB Base Score: 10.0
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 76687
Nessus Name: CentOS 5 / 6 : thunderbird (CESA-2014:0918)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 702986
OpenVAS Name: Debian Security Advisory DSA 2986-1 (iceweasel - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox/Thunderbird 31

Timelineinfo

01/16/2014 🔍
07/22/2014 +187 days 🔍
07/22/2014 +0 days 🔍
07/22/2014 +0 days 🔍
07/22/2014 +0 days 🔍
07/23/2014 +1 days 🔍
07/23/2014 +0 days 🔍
07/23/2014 +0 days 🔍
11/25/2025 +4143 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA2014-61
Researcher: Jethro Beekman
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-1555 (🔍)
GCVE (CVE): GCVE-0-2014-1555
GCVE (VulDB): GCVE-100-67228

OVAL: 🔍
IAVM: 🔍

X-Force: 94774 - Mozilla Firefox andThunderbird nsDocLoader::OnProgress() code execution, High Risk
SecurityFocus: 68814 - Mozilla Firefox/Thunderbird CVE-2014-1555 Use After Free Memory Corruption Vulnerability
Secunia: 59591
SecurityTracker: 1030619 - Mozilla Firefox Multiple Flaws Let Remote Users Execute Arbitrary Code, Deny Service, and Spoof User Interface Elements
Vulnerability Center: 45568 - Mozilla Firefox and Thunderbird Remote DoS and Code Execution Due to a Use-After-Free - CVE-2014-1555, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 07/23/2014 11:43
Updated: 11/25/2025 21:40
Changes: 07/23/2014 11:43 (86), 06/02/2017 18:37 (2), 02/09/2022 18:46 (2), 02/09/2022 18:53 (1), 11/25/2025 21:40 (15)
Complete: 🔍
Cache ID: 216:EE0:103

Once again VulDB remains the best source for vulnerability data.

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