# CVE-2017-3790: Denial of service in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable > Remote unauthenticated attackers can cause a denial of service by sending crafted H.323 RTP packets, crashing the Cisco Expressway or VCS system. - **Severity:** High 8.6 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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:** 1 Feb 2017 - **Updated:** 5 Aug 2024 - **Also known as:** GHSA-4776-frm5-r3rr ## What is CVE-2017-3790? CVE-2017-3790 is a high-severity denial of service vulnerability in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable, published on 1 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description A vulnerability in the received packet parser of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) software could allow an unauthenticated, remote attacker to cause a reload of the affected system, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient size validation of user-supplied data. An attacker could exploit this vulnerability by sending crafted H.224 data in Real-Time Transport Protocol (RTP) packets in an H.323 call. An exploit could allow the attacker to overflow a buffer in a cache that belongs to the received packet parser, which will result in a crash of the application, resulting in a DoS condition. All versions of Cisco Expressway Series Software and Cisco TelePresence VCS Software prior to version X8.8.2 are vulnerable. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Cisco Bug IDs: CSCus99263. Weakness: CWE-20 (Improper Input Validation), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), CWE-399 ## Which versions are affected by CVE-2017-3790? It affects 2 products. Products: Cisco Expressway, Cisco Telepresence Video Communication Server. ## How do I fix CVE-2017-3790? No fix has been published for CVE-2017-3790 yet. Limit exposure of the affected software until one is available. ## Is CVE-2017-3790 being exploited? There is no known exploitation of CVE-2017-3790 in the wild and no public exploit code. ## Other vulnerabilities in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable - [CVE-2024-20252](https://insights.sbomify.com/CVE-2024-20252/): Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway (critical 9.6) - [CVE-2024-20254](https://insights.sbomify.com/CVE-2024-20254/): Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway (critical 9.6) - [CVE-2022-20812](https://insights.sbomify.com/CVE-2022-20812/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0) - [CVE-2022-20813](https://insights.sbomify.com/CVE-2022-20813/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0) - [CVE-2024-20255](https://insights.sbomify.com/CVE-2024-20255/): Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway (high 8.2) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2017-3790 and fix it if it is affected. What it is: CVE-2017-3790 is a high-severity denial of service vulnerability in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable, published on 1 Feb 2017. 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-2017-3790 in the wild and no public exploit code. Affected product: Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable. 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-2017-3790/ (Markdown: https://insights.sbomify.com/CVE-2017-3790/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2017-3790 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-3790 - OSV: https://osv.dev/vulnerability/CVE-2017-3790 --- From sbomify Insights: https://insights.sbomify.com/CVE-2017-3790/ Summaries are generated and may contain mistakes; the official description above is the record.