VDB-138824 · CVE-2019-11921 · GCVE-0-2019-11921

Proxygen prior v2019.07.22.00 HTTP Header Crafted Packet out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	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.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Proxygen. This issue affects some unknown processing of the component HTTP Header Handler. Such manipulation as part of Crafted Packet leads to out-of-bounds write. This vulnerability is traded as CVE-2019-11921. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Proxygen (Firewall Software). It has been rated as critical. Affected by this issue is an unknown function of the component HTTP Header Handler. The manipulation as part of a Crafted Packet leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An out of bounds write is possible via a specially crafted packet in certain configurations of Proxygen due to improper handling of Base64 when parsing malformed binary content in Structured HTTP Headers. This issue affects versions of proxygen prior to v2019.07.22.00.

The weakness was shared 07/25/2019 (Website). The advisory is shared for download at facebook.com. This vulnerability is handled as CVE-2019-11921 since 05/13/2019. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version v2019.07.22.00 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Firewall Software

Name

Proxygen

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Proxygen v2019.07.22.00
Patch: github.com

Timelineinfo

05/13/2019 🔍
07/25/2019 +73 days 🔍
07/26/2019 +1 days 🔍
11/13/2023 +1571 days 🔍

Sourcesinfo

Advisory: 2f07985bef9fbae124cc63e5c0272e32da4fdaec
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-11921 (🔍)
GCVE (CVE): GCVE-0-2019-11921
GCVE (VulDB): GCVE-100-138824

Entryinfo

Created: 07/26/2019 07:58
Updated: 11/13/2023 08:23
Changes: 07/26/2019 07:58 (56), 07/12/2020 17:18 (1), 11/13/2023 08:23 (5)
Complete: 🔍
Cache ID: 216::103