Exim up to 4.87 key management

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 Exim up to 4.87. Affected is an unknown function. Performing a manipulation results in key management. This vulnerability is cataloged as CVE-2016-9963. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Exim up to 4.87 (Mail Server Software). This affects an unknown functionality. The manipulation with an unknown input leads to a key management vulnerability. CWE is classifying the issue as CWE-320. This is going to have an impact on confidentiality. The summary by CVE is:

Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.

The bug was discovered 12/16/2016. The weakness was shared 12/16/2016 by Bjoern Jacke as CVE Request - Exim 4.69-4.87 - disclosure of private information as confirmed posting (oss-sec). It is possible to read the advisory at openwall.com. The vendor cooperated in the coordination of the public release. This vulnerability is uniquely identified as CVE-2016-9963 since 12/16/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 96097 (Debian DLA-762-1 : exim4 security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170316 (OpenSUSE Security Update for exim (openSUSE-SU-2017:2289-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (96097), SecurityFocus (BID 94947†) and SecurityTracker (ID 1037484†). The entries VDB-81702 and VDB-102674 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Mail Server Software

Name

• Exim

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12
• 4.13
• 4.14
• 4.15
• 4.16
• 4.17
• 4.18
• 4.19
• 4.20
• 4.21
• 4.22
• 4.23
• 4.24
• 4.25
• 4.26
• 4.27
• 4.28
• 4.29
• 4.30
• 4.31
• 4.32
• 4.33
• 4.34
• 4.35
• 4.36
• 4.37
• 4.38
• 4.39
• 4.40
• 4.41
• 4.42
• 4.43
• 4.44
• 4.45
• 4.46
• 4.47
• 4.48
• 4.49
• 4.50
• 4.51
• 4.52
• 4.53
• 4.54
• 4.55
• 4.56
• 4.57
• 4.58
• 4.59
• 4.60
• 4.61
• 4.62
• 4.63
• 4.64
• 4.65
• 4.66
• 4.67
• 4.68
• 4.69
• 4.70
• 4.71
• 4.72
• 4.73
• 4.74
• 4.75
• 4.76
• 4.77
• 4.78
• 4.79
• 4.80
• 4.81
• 4.82
• 4.83
• 4.84
• 4.85
• 4.86
• 4.87

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
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: Key management
CWE: CWE-320
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

Nessus ID: 96097
Nessus Name: Debian DLA-762-1 : exim4 security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703747
OpenVAS Name: Debian Security Advisory DSA 3747-1 (exim4 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

12/15/2016 🔍
12/16/2016 +1 days 🔍
12/16/2016 +0 days 🔍
12/16/2016 +0 days 🔍
12/16/2016 +0 days 🔍
12/19/2016 +3 days 🔍
12/25/2016 +6 days 🔍
12/27/2016 +2 days 🔍
02/01/2017 +36 days 🔍
07/09/2019 +888 days 🔍

Sourcesinfo

Advisory: CVE Request - Exim 4.69-4.87 - disclosure of private information
Researcher: Bjoern Jacke
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-9963 (🔍)
GCVE (CVE): GCVE-0-2016-9963
GCVE (VulDB): GCVE-100-94599

OVAL: 🔍

SecurityFocus: 94947 - Exim CVE-2016-9963 Unspecified Information Disclosure Vulnerability
SecurityTracker: 1037484

See also: 🔍

Entryinfo

Created: 12/19/2016 08:07
Updated: 07/09/2019 20:35
Changes: 12/19/2016 08:07 (81), 07/09/2019 20:35 (7)
Complete: 🔍
Cache ID: 216:898:103

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

Discussion

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