Exadel Flamingo amf-serializer 2.2.0 AMF3 Deserializer AMF3 Message xml external entity reference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Exadel Flamingo amf-serializer 2.2.0. It has been classified as critical. Affected is an unknown function of the component AMF3 Deserializer. The manipulation as part of AMF3 Message leads to xml external entity reference. This vulnerability is uniquely identified as CVE-2017-3206. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Exadel Flamingo amf-serializer 2.2.0 and classified as critical. This issue affects an unknown code block of the component AMF3 Deserializer. The manipulation as part of a AMF3 Message leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Java implementation of AMF3 deserializers used by Flamingo amf-serializer by Exadel, version 2.2.0, allows external entity references (XXEs) from XML documents embedded within AMF3 messages. If the XML parsing is handled incorrectly it could potentially expose sensitive data on the server, denial of service, or server side request forgery.

The bug was discovered 04/04/2017. The weakness was disclosed 06/11/2018 by Markus Wulftange as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. The identification of this vulnerability is CVE-2017-3206 since 12/05/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 433 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 97380†). The entries VDB-99550, VDB-119322, VDB-119323 and VDB-119324 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/05/2016 🔍
04/04/2017 +120 days 🔍
04/04/2017 +0 days 🔍
06/11/2018 +432 days 🔍
06/11/2018 +0 days 🔍
06/12/2018 +1 days 🔍
12/26/2024 +2389 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Researcher: Markus Wulftange
Status: Confirmed

CVE: CVE-2017-3206 (🔍)
GCVE (CVE): GCVE-0-2017-3206
GCVE (VulDB): GCVE-100-119327
CERT: 🔍
SecurityFocus: 97380 - Exadel Flamingo Multiple Remote Code Execution and XML External Entity Injection Vulnerabilities

See also: 🔍

Entryinfo

Created: 06/12/2018 08:47
Updated: 12/26/2024 23:27
Changes: 06/12/2018 08:47 (62), 02/17/2020 17:55 (4), 12/26/2024 23:27 (17)
Complete: 🔍
Cache ID: 216::103

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

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