# CVE-2017-6779: Denial of service in Multiple Cisco Products unknown > Unauthenticated remote attackers can cause denial of service by filling disk space via unbounded system log files in Cisco collaboration products. - **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** No - **Published:** 7 Jun 2018 - **Updated:** 29 Nov 2024 - **Also known as:** GHSA-jfgw-vvcr-pv6q ## What is CVE-2017-6779? CVE-2017-6779 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 7 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description Multiple Cisco products are affected by a vulnerability in local file management for certain system log files of Cisco collaboration products that could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability occurs because a certain system log file does not have a maximum size restriction. Therefore, the file is allowed to consume the majority of available disk space on the appliance. An attacker could exploit this vulnerability by sending crafted remote connection requests to the appliance. Successful exploitation could allow the attacker to increase the size of a system log file so that it consumes most of the disk space. The lack of available disk space could lead to a DoS condition in which the application functions could operate abnormally, making the appliance unstable. This vulnerability affects the following Cisco Voice Operating System (VOS)-based products: Emergency Responder, Finesse, Hosted Collaboration Mediation Fulfillment, MediaSense, Prime License Manager, SocialMiner, Unified Communications Manager (UCM), Unified Communications Manager IM and Presence Service (IM&P - earlier releases were known as Cisco Unified Presence), Unified Communication Manager Session Management Edition (SME), Unified Contact Center Express (UCCx), Unified Intelligence Center (UIC), Unity Connection, Virtualized Voice Browser. This vulnerability also affects Prime Collaboration Assurance and Prime Collaboration Provisioning. Cisco Bug IDs: CSCvd10872, CSCvf64322, CSCvf64332, CSCvi29538, CSCvi29543, CSCvi29544, CSCvi29546, CSCvi29556, CSCvi29571, CSCvi31738, CSCvi31741, CSCvi31762, CSCvi31807, CSCvi31818, CSCvi31823. Weakness: CWE-400 (Uncontrolled Resource Consumption), CWE-399 ## Which versions are affected by CVE-2017-6779? It affects 13 products. Products: Cisco Emergency Responder, Cisco Finesse, Cisco Hosted Collaboration Mediation Fulfillment, Cisco Mediasense, Cisco Prime Collaboration Assurance, Cisco Prime Collaboration Provisioning, Cisco Prime License Manager, Cisco Socialminer, Cisco Unified Communications Manager, Cisco Unified Contact Center Express, Cisco Unified Intelligence Center, Cisco Unity Connection, Cisco Virtualized Voice Browser. ## How do I fix CVE-2017-6779? No fix has been published for CVE-2017-6779 yet. Limit exposure of the affected software until one is available. ## Is CVE-2017-6779 being exploited? There is no known exploitation of CVE-2017-6779 in the wild and no public exploit code. ## Other vulnerabilities in Cisco Unified Communications Manager - [CVE-2008-1154](https://insights.sbomify.com/CVE-2008-1154/): Auth bypass in n/a (critical 10.0) - [CVE-2023-20101](https://insights.sbomify.com/CVE-2023-20101/): Hardcoded credentials in Cisco Emergency Responder (critical 9.8) - [CVE-2017-12337](https://insights.sbomify.com/CVE-2017-12337/): Hardcoded credentials in Cisco Voice Operating System (critical 9.8) - [CVE-2016-6468](https://insights.sbomify.com/CVE-2016-6468/): Cross-site request forgery in Cisco Emergency Responder (high 8.8) - [CVE-2023-20259](https://insights.sbomify.com/CVE-2023-20259/): Denial of service in Cisco Emergency Responder (high 8.6) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2017-6779 and fix it if it is affected. What it is: CVE-2017-6779 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 7 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2017-6779 in the wild and no public exploit code. Affected product: Cisco Unified Communications Manager. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2017-6779/ (Markdown: https://insights.sbomify.com/CVE-2017-6779/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6779 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6779 - OSV: https://osv.dev/vulnerability/CVE-2017-6779 --- From sbomify Insights: https://insights.sbomify.com/CVE-2017-6779/ Summaries are generated and may contain mistakes; the official description above is the record.