涵蓋多種產品的 Cisco 重大弱點，據聞 CVE-2019-1913 弱點攻擊碼已發表
Cisco published new advisories for Integrated Management Controller (IMC) and Unified Computing System (UCS) Director, and updates for Small Business 220 Series Smart Switches that include the existence of public exploit code.
背景說明
On August 21, Cisco published 27 new advisories and updated six advisories across a variety of its products.
分析
Twelve of the advisories address vulnerabilities in Cisco Integrated Management Controller (IMC) used to manage Cisco Unified Computing System (UCS) C-Series Rack Servers and S-Series Storage Servers. Six advisories are for vulnerabilities affecting Cisco IMC Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data. Four of the six advisories are rated by Cisco as Critical.
| CVE | 產品 | Impact | 類別 | CVSSv3 (Vendor) | 嚴重性 |
|---|---|---|---|---|---|
| CVE-2019-1938 | Cisco UCS Director and Cisco UCS Director Express for Big Data API | Authentication Bypass | Unauthenticated | 9.8 | 重大 |
| CVE-2019-1935 | Cisco IMC Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data | User Default Credentials | Unauthenticated | 9.8 | 重大 |
| CVE-2019-1937 | Cisco IMC Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data | Authentication Bypass | Unauthenticated | 9.8 | 重大 |
| CVE-2019-1974 | Cisco IMC Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data | Authentication Bypass | Unauthenticated | 9.8 | 重大 |
| CVE-2019-12634 | Cisco IMC Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data | Command Injection | Unauthenticated | 8.6 | 高 |
| CVE-2019-1936 | Cisco IMC Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data | Command Injection | Authenticated | 7.2 | 高 |
Five of the six vulnerabilities could be exploited by an unauthenticated, remote attacker sending specially crafted requests to a vulnerable system. CVE-2019-1936 can only be exploited by an authenticated, remote attacker who is capable of logging into the vulnerable management interface. However, with CVE-2019-1935, an attacker could exploit this vulnerability by using the ‘scpuser’ account. According to Cisco, this default account has “incorrect permission settings” and uses an “undocumented default password” to log into a vulnerable system. Tenable has not yet confirmed whether use of the scpuser account would allow an attacker to exploit CVE-2019-1936.
Cisco also patched several additional IMC vulnerabilities this month.
| CVE | Impact | CVSSv3 | 嚴重性 |
|---|---|---|---|
| CVE-2019-1907 | 權限提升 | 8.8 | 高 |
| CVE-2019-1865 | Command Injection | 8.8 | 高 |
| CVE-2019-1864 | Command Injection | 8.8 | 高 |
| CVE-2019-1900 | Denial of Service | 7.5 | 高 |
| CVE-2019-1908 | Information Disclosure | 7.5 | 高 |
| CVE-2019-1896 | Command Injection | 7.2 | 高 |
| CVE-2019-1885 | Command Injection | 7.2 | 高 |
| CVE-2019-1634 | Command Injection | 7.2 | 高 |
| CVE-2019-1850 | Command Injection | 7.2 | 高 |
| CVE-2019-1871 | Buffer Overflow | 7.2 | 高 |
| CVE-2019-1883 | Command Injection | 7.0 | 高 |
| CVE-2019-1863 | 權限提升 | 6.5 | 高 |
In addition to these new advisories, Cisco released several updates for previously published advisories. This includes updates to the recently reported vulnerabilities in the Cisco Small Business 220 Series Smart Switches from August 6.
| CVE | Impact | CVSSv3 | Tenable VPR | 嚴重性 |
|---|---|---|---|---|
| CVE-2019-1913 | Remote Code Execution | 9.8 | 8.9 | 重大 |
| CVE-2019-1912 | Authentication Bypass | 9.1 | 8.3 | 重大 |
| CVE-2019-1914 | Command Injection | 7.2 | 8.6 | 中度 |
Two of the three 220 Series Smart Switches vulnerabilities are rated as Critical and exist within the web management interface of these devices. Sending specially crafted requests to the vulnerable interface could allow a remote attacker to execute arbitrary code (CVE-2019-1913) or modify the device configuration (CVE-2019-1912). CVE-2019-1914 requires an attacker to be authenticated on a vulnerable interface and have level 15 permissions.
Additionally, Cisco updated its advisory for CVE-2019-1649, the Secure Boot Hardware Tampering Vulnerability known as Thrangrycat, to account for additional vulnerable products.
概念驗證
Cisco’s Product Security Incident Response Team (PSIRT) notes in the updated advisories for the Small Business 220 Series Smart Switches that they are aware of the presence of public exploit code for these devices. However, at the time this blog post was published, Tenable has not identified a proof of concept (PoC) for these vulnerabilities.
解決方法
Cisco has released updates for each of the affected products. The affected versions and relevant fixed versions can be found under the advisory pages. Customers should obtain and install these updates as soon as possible.
找出受影響的系統
A list of Tenable plugins to identify these vulnerabilities will appear here as they’re released.
Get more information
加入 Tenable Community 的 Tenable 安全回應團隊。
深入瞭解 Tenable，這是用於全面管理新型攻擊破綻的首創 Cyber Exposure 平台。
Get a free 60-day trial of Tenable.io Vulnerability Management.
相關文章
CVE-2024-7593: Ivanti Virtual Traffic Manager Authentication Bypass Vulnerability
August 14, 2024Ivanti released a patch for a critical severity authentication bypass vulnerability and a warning that exploit code is publicly available
Microsoft’s August 2024 Patch Tuesday Addresses 88 CVEs
August 13, 2024Microsoft addresses 88 CVEs with seven critical vulnerabilities and 10 zero-day vulnerabilities, six of which were exploited in the wild.
Compromising Microsoft's AI Healthcare Chatbot Service
August 13, 2024Tenable Research discovered multiple privilege-escalation issues in the Azure Health Bot Service via a server-side request forgery (SSRF), which allowed researchers access to cross-tenant resources.