VDB-97104 · CVE-2016-6870 · GCVE-0-2016-6870

Facebook HHVM up to 3.14.x mb_detect_encoding/mb_send_mail/mb_detect_order 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.
8.2	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Facebook HHVM up to 3.14.x. The impacted element is the function mb_detect_encoding/mb_send_mail/mb_detect_order. The manipulation results in out-of-bounds write. This vulnerability is cataloged as CVE-2016-6870. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Facebook HHVM up to 3.14.x (Social Network Software). Affected is the function mb_detect_encoding/mb_send_mail/mb_detect_order. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Out-of-bounds write in the (1) mb_detect_encoding, (2) mb_send_mail, and (3) mb_detect_order functions in Facebook HHVM before 3.15.0 allows attackers to have unspecified impact via unknown vectors.

The bug was discovered 08/11/2016. The weakness was shared 02/17/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2016-6870 since 08/18/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 190 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 3.15.0 eliminates this vulnerability.

The entries VDB-97105, VDB-97106, VDB-97107 and VDB-97108 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Social Network Software

Name

Facebook HHVM

Version

License

free

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
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: Facebook HHVM 3.15.0

Timelineinfo

08/11/2016 🔍
08/18/2016 +7 days 🔍
02/17/2017 +183 days 🔍
02/17/2017 +0 days 🔍
02/18/2017 +1 days 🔍
08/15/2020 +1274 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6870 (🔍)
GCVE (CVE): GCVE-0-2016-6870
GCVE (VulDB): GCVE-100-97104
OSVDB: - CVE-2016-6870 - Facebook - HHVM - Out-of-Bounds Write Issue

See also: 🔍

Entryinfo

Created: 02/18/2017 08:59
Updated: 08/15/2020 18:12
Changes: 02/18/2017 08:59 (61), 08/15/2020 18:12 (2)
Complete: 🔍
Cache ID: 216:6BE:103

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