Mozilla Firefox/Thunderbird/Firefox ESR HTTP/2 Cache use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox, Thunderbird and Firefox ESR and classified as problematic. This affects an unknown part of the component HTTP2 Cache Handler. The manipulation results in use after free. This vulnerability is reported as CVE-2019-11713. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Mozilla Firefox, Thunderbird and Firefox ESR (Web Browser) (the affected version is unknown). Affected is an unknown code of the component HTTP2 Cache Handler. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability. CVE summarizes:

A use-after-free vulnerability can occur in HTTP/2 when a cached HTTP/2 stream is closed while still in use, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

The weakness was disclosed 07/23/2019 (Website). The advisory is shared for download at security.gentoo.org. This vulnerability is traded as CVE-2019-11713 since 05/03/2019. 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 neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/26/2025).

Upgrading eliminates this vulnerability.

The entries VDB-138488, VDB-138489, VDB-138490 and VDB-138491 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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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: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/03/2019 🔍
07/23/2019 +81 days 🔍
07/23/2019 +0 days 🔍
11/26/2025 +2318 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: DLA 1869-1
Status: Confirmed

CVE: CVE-2019-11713 (🔍)
GCVE (CVE): GCVE-0-2019-11713
GCVE (VulDB): GCVE-100-138492
See also: 🔍

Entryinfo

Created: 07/23/2019 21:41
Updated: 11/26/2025 10:24
Changes: 07/23/2019 21:41 (56), 07/10/2020 07:26 (1), 11/06/2023 09:12 (4), 11/26/2025 10:24 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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