Mozilla Firefox out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$5k-$25k0.00

Summaryinfo

A vulnerability classified as critical has been found in Mozilla Firefox. The affected element is the function AppendEncodedAttributeValue/ExtraSpaceNeededForAttrEncoding/AppendEncodedCharacters. This manipulation causes out-of-bounds write. This vulnerability appears as CVE-2024-2608. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox (version now known). It has been declared as critical. Affected by this vulnerability is the function AppendEncodedAttributeValue/ExtraSpaceNeededForAttrEncoding/AppendEncodedCharacters. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

`AppendEncodedAttributeValue(), ExtraSpaceNeededForAttrEncoding()` and `AppendEncodedCharacters()` could have experienced integer overflows, causing underallocation of an output buffer leading to an out of bounds write. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.

It is possible to read the advisory at mozilla.org. This vulnerability is known as CVE-2024-2608 since 03/18/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/18/2025).

The vulnerability scanner Nessus provides a plugin with the ID 239942 (TencentOS Server 2: firefox (TSSA-2024:0095)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (239942). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

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License

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

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

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 239942
Nessus Name: TencentOS Server 2: firefox (TSSA-2024:0095)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: mozilla.org

Timelineinfo

03/18/2024 🔍
03/19/2024 +1 days 🔍
03/19/2024 +0 days 🔍
06/18/2025 +456 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: DLA 3769-1
Status: Confirmed

CVE: CVE-2024-2608 (🔍)
GCVE (CVE): GCVE-0-2024-2608
GCVE (VulDB): GCVE-100-257263

Entryinfo

Created: 03/19/2024 14:22
Updated: 06/18/2025 03:25
Changes: 03/19/2024 14:22 (54), 05/02/2024 02:39 (1), 03/13/2025 17:04 (2), 04/14/2025 11:30 (3), 06/18/2025 03:25 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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