VDB-96503 · CVE-2016-6237 · ID 26

Dropbox Lepton 1.0 JPEG File lepton/jpgcoder.cc build_huffcodes 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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Dropbox Lepton 1.0. Affected by this vulnerability is the function build_huffcodes of the file lepton/jpgcoder.cc of the component JPEG File Handler. The manipulation leads to out-of-bounds write. This vulnerability is listed as CVE-2016-6237. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Dropbox Lepton 1.0 (Cloud Software) and classified as problematic. This issue affects the function build_huffcodes of the file lepton/jpgcoder.cc of the component JPEG File Handler. The manipulation with an unknown input 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 availability. The summary by CVE is:

The build_huffcodes function in lepton/jpgcoder.cc in Dropbox lepton 1.0 allows remote attackers to cause denial of service (out-of-bounds write) via a crafted jpeg file.

The bug was discovered 07/17/2016. The weakness was presented 02/02/2017 (Website). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2016-6237 since 07/17/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 200 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.

See VDB-96500, VDB-96501, VDB-96502 and VDB-96504 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Cloud Software

Name

Dropbox Lepton

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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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: Partially
Local: Yes
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/17/2016 🔍
07/17/2016 +0 days 🔍
02/02/2017 +200 days 🔍
02/02/2017 +0 days 🔍
02/03/2017 +1 days 🔍
11/11/2022 +2107 days 🔍

Sourcesinfo

Advisory: 26
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6237 (🔍)
GCVE (CVE): GCVE-0-2016-6237
GCVE (VulDB): GCVE-100-96503
OSVDB: - CVE-2016-6237 - Dropbox - lepton - Out-of-Bounds Write Issue

See also: 🔍

Entryinfo

Created: 02/03/2017 10:02
Updated: 11/11/2022 13:04
Changes: 02/03/2017 10:02 (58), 08/10/2020 09:06 (4), 11/11/2022 13:04 (3)
Complete: 🔍
Cache ID: 216::103