# CVE-2017-6770: Other in Multiple Cisco Products > Remote attackers can hijack OSPF routing tables by injecting crafted packets, enabling traffic interception or black-holing on Cisco network devices. - **Severity:** Medium 4.2 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** No - **Published:** 7 Aug 2017 - **Updated:** 5 Aug 2024 - **Also known as:** GHSA-jc99-3vhg-wq8g ## What is CVE-2017-6770? CVE-2017-6770 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, published on 7 Aug 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. ### Official description Cisco IOS 12.0 through 15.6, Adaptive Security Appliance (ASA) Software 7.0.1 through 9.7.1.2, NX-OS 4.0 through 12.0, and IOS XE 3.6 through 3.18 are affected by a vulnerability involving the Open Shortest Path First (OSPF) Routing Protocol Link State Advertisement (LSA) database. This vulnerability could allow an unauthenticated, remote attacker to take full control of the OSPF Autonomous System (AS) domain routing table, allowing the attacker to intercept or black-hole traffic. The attacker could exploit this vulnerability by injecting crafted OSPF packets. Successful exploitation could cause the targeted router to flush its routing table and propagate the crafted OSPF LSA type 1 update throughout the OSPF AS domain. To exploit this vulnerability, an attacker must accurately determine certain parameters within the LSA database on the target router. This vulnerability can only be triggered by sending crafted unicast or multicast OSPF LSA type 1 packets. No other LSA type packets can trigger this vulnerability. OSPFv3 is not affected by this vulnerability. Fabric Shortest Path First (FSPF) protocol is not affected by this vulnerability. Cisco Bug IDs: CSCva74756, CSCve47393, CSCve47401. Weakness: CWE-20 (Improper Input Validation) ## Which versions are affected by CVE-2017-6770? It affects 7 products. Products: Cisco Adaptive Security Appliance Software, Cisco Ios, Cisco Ios Xe, Cisco Nx-Os, Cisco Nx-Os for Nexus 5500 Platform Switches, Cisco Nx-Os for Nexus 5600 Platform Switches, Cisco Nx-Os for Nexus 7700 Series Switches. ## How do I fix CVE-2017-6770? No fix has been published for CVE-2017-6770 yet. Limit exposure of the affected software until one is available. ## Is CVE-2017-6770 being exploited? There is no known exploitation of CVE-2017-6770 in the wild and no public exploit code. ## Other vulnerabilities in Cisco Adaptive Security Appliance Software - [CVE-2025-20333](https://insights.sbomify.com/CVE-2025-20333/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow (critical 9.9, exploited in the wild) - [CVE-2016-6366](https://insights.sbomify.com/CVE-2016-6366/): Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow (high 8.8, exploited in the wild) - [CVE-2026-20349](https://insights.sbomify.com/CVE-2026-20349/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection (high 8.6, exploited in the wild) - [CVE-2024-20353](https://insights.sbomify.com/CVE-2024-20353/): Cisco ASA and FTD Denial of Service (high 8.6, exploited in the wild) - [CVE-2016-6367](https://insights.sbomify.com/CVE-2016-6367/): Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution (high 7.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2017-6770 and fix it if it is affected. What it is: CVE-2017-6770 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, published on 7 Aug 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2017-6770 in the wild and no public exploit code. Affected product: Cisco Adaptive Security Appliance Software. 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-2017-6770/ (Markdown: https://insights.sbomify.com/CVE-2017-6770/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6770 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6770 - OSV: https://osv.dev/vulnerability/CVE-2017-6770 --- From sbomify Insights: https://insights.sbomify.com/CVE-2017-6770/ Summaries are generated and may contain mistakes; the official description above is the record.