VDB-97187 · CVE-2017-3827 · BID 96239

Cisco Email Security Appliance/Web Security Appliance 9.9.9-894/10.0.0-203/WSA10.0.0-233 MIME Scanner input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$5k-$25k0.00

Summaryinfo

A vulnerability classified as critical has been found in Cisco Email Security Appliance and Web Security Appliance 9.9.9-894/10.0.0-203/WSA10.0.0-233. This affects an unknown part of the component MIME Scanner. The manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2017-3827. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Cisco Email Security Appliance and Web Security Appliance 9.9.9-894/10.0.0-203/WSA10.0.0-233 (Anti-Malware Software) and classified as critical. This issue affects some unknown processing of the component MIME Scanner. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the Multipurpose Internet Mail Extensions (MIME) scanner of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) and Web Security Appliances (WSA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. Affected Products: This vulnerability affects all releases prior to the first fixed release of Cisco AsyncOS Software for Cisco ESA and Cisco WSA, both virtual and hardware appliances, that are configured with message or content filters to scan incoming email attachments on the ESA or services scanning content of web access on the WSA. More Information: SCvb91473, CSCvc76500. Known Affected Releases: 10.0.0-203 9.9.9-894 WSA10.0.0-233.

The bug was discovered 02/15/2017. The weakness was disclosed 02/22/2017 with Cisco as cisco-sa-20170215-asyncos as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2017-3827 since 12/21/2016. 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 pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 12/25/2024).

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $25k-$100k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316085 (Cisco AsyncOS Software for Cisco ESA and Cisco WSA Filtering Bypass Vulnerability (cisco-sa-20170215-asyncos)).

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 databases at SecurityFocus (BID 96239†) and SecurityTracker (ID 1037831†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

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

NVD Base Score: 5.8
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: Input validation
CWE: CWE-20
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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OpenVAS ID: 103403
OpenVAS Name: Cisco AsyncOS Software for Cisco ESA Filtering Bypass Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/21/2016 🔍
02/15/2017 +56 days 🔍
02/15/2017 +0 days 🔍
02/21/2017 +6 days 🔍
02/22/2017 +1 days 🔍
02/22/2017 +0 days 🔍
12/25/2024 +2863 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170215-asyncos
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-3827 (🔍)
GCVE (CVE): GCVE-0-2017-3827
GCVE (VulDB): GCVE-100-97187
SecurityFocus: 96239 - Cisco AsyncOS for Email Security Appliance CVE-2017-3827 Remote Security Bypass Vulnerability
OSVDB: - CVE-2017-3827 - Cisco - AsyncOS - Security Bypass Issue
SecurityTracker: 1037831

Entryinfo

Created: 02/22/2017 11:59
Updated: 12/25/2024 18:11
Changes: 02/22/2017 11:59 (65), 08/16/2020 11:59 (6), 08/28/2024 11:32 (17), 12/25/2024 18:11 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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