Mozilla Firefox up to 115.23.1 use after free

Summaryinfo

A vulnerability marked as problematic has been reported in Mozilla Firefox. This issue affects some unknown processing. This manipulation causes use after free. This vulnerability is registered as CVE-2023-4049. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Mozilla Firefox (Web Browser). Affected by this vulnerability is an unknown code. 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 summary by CVE is:

Race conditions in reference counting code were found through code inspection. These could have resulted in potentially exploitable use-after-free vulnerabilities. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

The weakness was published 08/01/2023. It is possible to read the advisory at mozilla.org. This vulnerability is known as CVE-2023-4049 since 08/01/2023. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/20/2025).

The vulnerability scanner Nessus provides a plugin with the ID 239763 (TencentOS Server 4: thunderbird (TSSA-2024:0450)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 116 eliminates this vulnerability. The upgrade is hosted for download at mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (239763). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.7.1
• 0.7.2
• 0.7.3
• 0.8
• 0.9
• 0.9.1
• 0.9.2
• 0.9.2.1
• 0.9.3
• 0.9.4
• 0.9.4.1
• 0.9.5
• 0.9.6
• 0.9.7
• 0.9.8
• 0.9.9
• 0.9.35
• 0.9.48
• 0.10
• 0.10.1
• 1.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.1
• 1.1.8
• 1.2
• 1.2.1
• 1.3
• 1.3.1
• 1.4
• 1.4.1
• 1.4.2
• 1.4.4
• 1.5
• 1.5.0.1
• 1.5.0.2
• 1.5.0.3
• 1.5.0.4
• 1.5.0.5
• 1.5.0.6
• 1.5.0.7
• 1.5.0.8
• 1.5.0.9
• 1.5.0.10
• 1.5.0.11
• 1.5.0.12
• 1.5.0.14
• 1.5.1
• 1.5.2
• 1.5.3
• 1.5.4
• 1.5.5
• 1.5.6
• 1.5.7
• 1.5.8
• 1.6
• 1.7
• 1.7.1
• 1.7.2
• 1.7.3
• 1.8
• 2
• 2.0
• 2.0 .4
• 2.0 8
• 2.0.0.1
• 2.0.0.2
• 2.0.0.3
• 2.0.0.4
• 2.0.0.5
• 2.0.0.6
• 2.0.0.7
• 2.0.0.8
• 2.0.0.9
• 2.0.0.10
• 2.0.0.11
• 2.0.0.12
• 2.0.0.13
• 2.0.0.14
• 2.0.0.15
• 2.0.0.16
• 2.0.0.17
• 2.0.0.18
• 2.0.0.19
• 2.0.0.20
• 2.0.1
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.9
• 2.0.10
• 2.1
• 2.2
• 2.5
• 3
• 3.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.0.12
• 3.0.13
• 3.0.14
• 3.0.15
• 3.0.16
• 3.0.17
• 3.0.19
• 3.0beta5
• 3.1
• 3.5
• 3.5.1
• 3.5.2
• 3.5.3
• 3.5.4
• 3.5.5
• 3.5.6
• 3.5.7
• 3.5.8
• 3.5.9
• 3.5.10
• 3.5.11
• 3.5.12
• 3.5.13
• 3.5.14
• 3.5.15
• 3.5.16
• 3.5.17
• 3.5.18
• 3.5.19
• 3.6
• 3.6.1
• 3.6.2
• 3.6.3
• 3.6.4
• 3.6.6
• 3.6.7
• 3.6.8
• 3.6.9
• 3.6.10
• 3.6.11
• 3.6.12
• 3.6.13
• 3.6.14
• 3.6.15
• 3.6.16
• 3.6.17
• 3.6.18
• 3.6.19
• 3.6.20
• 3.6.21
• 3.6.22
• 3.6.26
• 3.6.28
• 3.7
• 3.11.5
• 4.0
• 4.0.1
• 5.0
• 5.0.1
• 6.0
• 6.0.1
• 6.0.2
• 7.0
• 7.0.1
• 8.0
• 8.0 for Mac
• 8.0.1
• 8.1
• 8.2
• 9.0
• 9.0.1
• 9.1
• 10.0
• 10.0.1
• 10.0.2
• 10.0.3
• 10.0.4
• 10.0.5
• 10.0.7
• 10.1
• 10.2
• 11.0
• 12.0
• 13.0
• 14
• 14.0.1
• 15
• 15.0.1 (downgrade)
• 15.0a1
• 16
• 16.0.1
• 16.0.2
• 17.0
• 17.0.1
• 17.0.2
• 17.0.3
• 17.0.4
• 17.0.5
• 17.0.6
• 18.0
• 19.0
• 19.0.1
• 19.0.2
• 20.0
• 20.0.1
• 21.0
• 22.0
• 23.0
• 23.0.1
• 24.0
• 24.0.1
• 24.0.2
• 24.1.0
• 24.1.1
• 24.2
• 24.3
• 24.4
• 24.5
• 24.7
• 25
• 25.0
• 25.0.1
• 26
• 26.0
• 27
• 27.0
• 28
• 28.0
• 28.0.1
• 29.0
• 29.0.1
• 30.0
• 31
• 31.0
• 31.1.0
• 31.1.1
• 31.2
• 31.3.0
• 32.0
• 33
• 33.0
• 34
• 34.0
• 34.0.5
• 35
• 36
• 36.0.3
• 36.0.4
• 37
• 37.0
• 37.0.1
• 37.0.2
• 38
• 38.0
• 39
• 39.0
• 39.0.3
• 40
• 40.0.3
• 41
• 41.0
• 41.0.1
• 42
• 43
• 43.0
• 44
• 44.0.2
• 45
• 45.0
• 45.6
• 47.0
• 48
• 49
• 49.0
• 49.0.2
• 50
• 50.0.1
• 50.0.2
• 50.1
• 51
• 51.0.3
• 52
• 52.6
• 52.8
• 53
• 54.0
• 55
• 56
• 57
• 57.0.1
• 58.0
• 58.0.1
• 59
• 59.0.1
• 60
• 60.0
• 60.0.2
• 61
• 62.0
• 62.0.3
• 63.0
• 64
• 64.0
• 65
• 65.0.0
• 65.0.1
• 66
• 66.0
• 67
• 67.0
• 67.0.2
• 67.0.3
• 67.0.4
• 68.0
• 68.0.2
• 68.7
• 68.11
• 68.12
• 69.0
• 69.0.1
• 70
• 70.0
• 71
• 71.0
• 72
• 72.0
• 74.0
• 74.0.0
• 74.0.1
• 75.0
• 76
• 76.0
• 77
• 77.0
• 78.0
• 78.4
• 78.7
• 78.10.1
• 80.0
• 81.0
• 82
• 82.0
• 83.0
• 84.0
• 85.0
• 86.0
• 87.0
• 88.0
• 89.0
• 89.0.1
• 90.0
• 91.0
• 91.0.1
• 91.7
• 91.8
• 92.0
• 93.0
• 94.0
• 95.0
• 96
• 97
• 98
• 99
• 100
• 101
• 102
• 102.2
• 102.6
• 103
• 104
• 105
• 106
• 107
• 108
• 109
• 110
• 110.1
• 111
• 112
• 113
• 114
• 115
• 115.0.2
• 115.6
• 115.9
• 115.23
• 115.23.1

License

• open-source

Website

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

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

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

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