Cisco NX-OS Software Netstack Denial of Service Vulnerability
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 5.2(1)SM3(2.1), 5.2(1)SV3(4.1a), 7.0(3)I7(6), 9.2(2), 6.0(2)A8(11), and 9 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
A vulnerability in the network stack of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to an issue with allocating and freeing memory buffers in the network stack. An attacker could exploit this vulnerability by sending crafted TCP streams to an affected device in a sustained way. A successful exploit could cause the network stack of an affected device to run out of available buffers, impairing operations of control plane and management plane protocols, resulting in a DoS condition. Note: This vulnerability can be triggered only by traffic that is destined to an affected device and cannot be exploited using traffic that transits an affected device. Nexus 1000V Switch for Microsoft Hyper-V is affected in versions prior to 5.2(1)SM3(2.1). Nexus 1000V Switch for VMware vSphere is affected in versions prior to 5.2(1)SV3(4.1a). Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I7(6) and 9.2(2). Nexus 3500 Platform Switches are affected in versions prior to 6.0(2)A8(11), 7.0(3)I7(6), and 9.2(2). Nexus 3600 Platform Switches are affected in versions prior to 7.0(3)F3(5) and 9.2(2). Nexus 5500, 5600, and 6000 Series Switches are affected in versions prior to 7.1(5)N1(1b) and 7.3(5)N1(1). Nexus 7000 and 7700 Series Switches are affected in versions prior to 6.2(22. Nexus 9500 R-Series Line Cards and Fabric Modules are affected in versions prior to 7.0(3)F3(5) and 9.2(2). UCS 6200 and 6300 Series Fabric Interconnect are affected in versions prior to 3.2(3j) and 4.0(2a). UCS 6400 Series Fabric Interconnect are affected in versions prior to 4.0(2a).
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Cisco Nexus 1000V Switch for Microsoft Hyper-V
fixed in 5.2(1)SM3(2.1)
- Cisco Nexus 1000V Switch for VMware vSphere
fixed in 5.2(1)SV3(4.1a)
- Cisco Nexus 3000 Series Switches
fixed in 7.0(3)I7(6); fixed in 9.2(2)
- Cisco Nexus 3500 Platform Switches
fixed in 6.0(2)A8(11); fixed in 7.0(3)I7(6); fixed in 9.2(2)
- Cisco Nexus 3600 Platform Switches
fixed in 7.0(3)F3(5); fixed in 9.2(2)
- Cisco Nexus 5500, 5600, and 6000 Series Switches
fixed in 7.1(5)N1(1b); fixed in 7.3(5)N1(1)
- Cisco Nexus 7000 and 7700 Series Switches
fixed in 6.2(22); fixed in 7.3(3)D1(1); fixed in 8.2(3); fixed in 8.3(2)
- Cisco Nexus 9000 Series Switches in Standalone NX-OS Mode
fixed in 7.0(3)I7(6); fixed in 9.2(2)
- Cisco Nexus 9500 R-Series Line Cards and Fabric Modules
fixed in 7.0(3)F3(5); fixed in 9.2(2)
- Cisco UCS 6200 and 6300 Series Fabric Interconnect
fixed in 3.2(3j); fixed in 4.0(2a)
- Cisco UCS 6400 Series Fabric Interconnect
fixed in 4.0(2a)