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Full vulnerability report · 2017
CVE-2017-12287High confidence

n/a Cisco Expressway Series and Cisco TelePresence Video Communication Server: security vulnerability

Unknown · Cisco Expressway Series and Cisco TelePresence Video Communication Server

Official source article: Cisco CISCO-SA-20171018-EXPRESSWAY-TP-VCS ↗. Check the applicable product and release in the original source.

4.3MediumCVSS 3.0
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 1.65% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Unknown Cisco Expressway Series and Cisco TelePresence Video Communication Server and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2017-3860

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
01

What, why and how

A vulnerability in the cluster database (CDB) management component of Cisco Expressway Series Software and Cisco TelePresence Video Communication Server (VCS) Software could allow an authenticated, remote attacker to cause the CDB process on an affected system to restart unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to incomplete input validation of URL requests by the REST API of the affected software. An attacker could exploit this vulnerability by sending a crafted URL to the REST API of the affected software on an affected system. A successful exploit could allow the attacker to cause the CDB process on the affected system to restart unexpectedly, resulting in a temporary DoS condition. Cisco Bug IDs: CSCve77571.

What

A vulnerability in the cluster database (CDB) management component of Cisco Expressway Series Software and Cisco TelePresence Video Communication Server (VCS) Software could allow an authenticated, remote attacker to cause the CDB process on an affected system to restart unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to incomplete input validation of URL requests by the REST API of the affected software. An attacker could exploit this vulnerability by sending a crafted URL to the REST API of the affected software on an affected system. A successful exploit could allow the attacker to cause the CDB process on the affected system to restart unexpectedly, resulting in a temporary DoS condition. Cisco Bug IDs: CSCve77571.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

A vulnerability in the cluster database (CDB) management component of Cisco Expressway Series Software and Cisco TelePresence Video Communication Server (VCS) Software could allow an authenticated, remote attacker to cause the CDB process on an affected system to restart unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to incomplete input validation of URL requests by the REST API of the affected software. An attacker could exploit this vulnerability by sending a crafted URL to the REST API of the affected software on an affected system. A successful exploit could allow the attacker to cause the CDB process on the affected system to restart unexpectedly, resulting in a temporary DoS condition. Cisco Bug IDs: CSCve77571.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → vulnerable operation → disrupt the affected service
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-399 ↗

CWE-399. Open the MITRE definition for the exact weakness description.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Common Vulnerability Scoring System 3.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.ALowAvailability impact: A successful attack can cause a limited loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkDenial of serviceCWE-399
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Canadian Centre for Cyber Security · English · AV17-162Cisco security updates

7 Apache Struts 2 Remote Code Execution Vulnerability Affecting Multiple Cisco Products: September 2017 Cisco NX-OS Software TCP Netstack Denial of Service Vulnerability Cisco Spark Hybrid Calendar Service Information Disclosure Vulnerability Cisco AMP for Endpoints Static Key Vulnerability Cisco Nexus Series Switches CLI Command Injection Vulnerability CVE References:   CVE-2017-3883, CVE-2017-12275,   CVE-2017-12278, CVE-2017-12261,  CVE-2017-12277, CVE-2017-12276, CVE-2017-12262, CVE-2017-12274, CVE-2017-12273, CVE-2017-12282, CVE-2017-12280, CVE-2017-12295, CVE-2017-12294, CVE-2017-12279, CVE-2017-12243,  CVE-2017-12283, CVE-2017-12281,  CVE-2017-12287, CVE-2017-6616,  CVE-2017-13077, CVE-2017-13078,  CVE-2017-9793, CVE-2017-9804, CVE-2017-12611, CVE-2015-0718,  CVE-2017-12310,  CVE-2017-12317, CVE-2017-6649. Suggested Action CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly. References: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171018-aaavty https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-wlc2 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-wlc1 https://tools.cisco.com/security/center/content/Cisco

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-157Cisco security updates

Cisco released multiple security updates to address vulnerabilities (medium to critical) in the following products. Multiple Vulnerabilities in Wi-Fi Protected Access and Wi-Fi Protected Access II, Cisco IOS XE Software Web Framework Cross-Site Scripting Vulnerability Cisco IOS XE Software Verbose Debug Logging Information Disclosure Vulnerability Cisco Expressway Series and Cisco TelePresence Video Communication Server REST API Denial of     Service Vulnerability Cisco Jabber for Windows Client Information Disclosure Vulnerability Cisco Jabber Information Disclosure Vulnerability Cisco Network Analysis Module Parameter Directory Traversal Arbitrary File Deletion Vulnerability, Cisco NX-OS Software Python Parser Escape Vulnerability Cisco SPA300 and SPA500 Series IP Phones Cross-Site Request Forgery Vulnerability, Cisco Unified Contact Center Express Cross-Site Scripting Vulnerability, Cisco WebEx Meeting Center Cross-Site Scripting Vulnerability Cisco WebEx Meetings Server Denial of Service Vulnerability Cisco WebEx Meetings Server Cross-Site Scripting Vulnerability Cisco FXOS and NX-OS System Software Authentication, Authorization, and Accounting Denial of   Service Vulnerability Cisco Small Business SPA51x Series IP Phones SIP Denial of Service Vulnerability Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones SIP Denial of Service Vulnerability, Cisco Cloud Services Platform 2100 Unauthorized Access Vulnerability. CVE References:  CVE-2017-13077, CVE-2017-13078,  CVE-2017-13079, CVE-2017-12272, CVE-2017-12289, CVE-2017-12287, CVE-2017-12284, CVE-2017-12286, CVE-2017-12285, CVE-2017-12301, CVE-2017-12271,  CVE-2017-12288, CVE-2017-12298, CVE-2017-12293, CVE-2017-12296, CVE-2017-3883, CVE-2017-12259, CVE-2017-12260, CVE-2017-12251

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-009447Cisco Expressway シリーズおよび TelePresence Video Communication Server のソフトウェアにおけるリソース管理に関する脆弱性

Cisco Expressway シリーズおよび TelePresence Video Communication Server (VCS) のソフトウェアには、リソース管理に関する脆弱性が存在します。 ベンダは、本脆弱性を Bug ID CSCve77571 として公開しています。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-4802Cisco 제품군 취약점 보안 업데이트 권고

REST API 서비스 거부 취약점(CVE-2017-12287)[3]

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
Cisco Expressway Series and Cisco TelePresence Video Communication Server: Cisco Expressway Series and Cisco TelePresence Video Communication Server
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 19 Oct 2017 · Last source change 5 Aug 2024, 18:36 UTC · CWE-399

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2017-3860
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2017-3860 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2017-3860"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: tools.cisco.com/cisco-sa-20171018-expressway-tp-vcs.
    Before
    no authoritative guidance recorded
    After
    vendor advisory: tools.cisco.com/cisco-sa-20171018-expressway-tp-vcs
    tools.cisco.com ↗
  3. SeveritySeverity changed from Unknown to Medium.
    Before
    Unknown
    After
    Medium
    NIST NVD ↗
  4. CVSS scoreCVSS score changed from not recorded to 4.3 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
    Before
    not recorded
    After
    4.3 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
    NIST NVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2017-3860↗Vendor advisory · Cisco CISCO-SA-20171018-EXPRESSWAY-TP-VCS↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2017-12287 · cve.blacktree.nl