據發現，Keepalived 未正確處理某些 HTTP 狀態回應程式碼。遠端攻擊者可利用此問題造成 Keepalived 損毀，進而引發拒絕服務或可能執行任意程式碼。

請注意，Tenable Network Security 已直接從 Ubuntu 安全性公告擷取前置描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

執行 CORE 5.04 / MAIN 5.04 版的遠端 NewStart CGSL 主機安裝了受一個弱點影響的 keepalived 套件：- 在 lib/html.c 的 extract_status_code() 函式中存在堆積型緩衝區溢位弱點，此弱點會剖析從網頁伺服器傳回的 HTTP 狀態碼，以允許惡意網頁伺服器或攔截式攻擊者假裝是網頁伺服器，造成拒絕服務，或者可能在 keepalived 負載平衡器上執行任意程式碼。(CVE-2018-19115) 請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼。

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-3995-1 advisory.

    It was discovered that Keepalived incorrectly handled certain HTTP status response codes. A remote     attacker could use this issue to cause Keepalived to crash, resulting in a denial of service, or possibly     execute arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the keepalived package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Heap-based buffer overflow vulnerability in     extract_status_code() function in lib/html.c that     parses HTTP status code returned from web server allows     malicious web server or man-in-the-middle attacker     pretending to be a web server to cause either a denial     of service or potentially execute arbitrary code on     keepalived load balancer.(CVE-2018-19115)

  - keepalived 2.0.8 used mode 0666 when creating new     temporary files upon a call to PrintData or PrintStats,     potentially leaking sensitive     information.(CVE-2018-19045)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has keepalived packages installed that are affected by a vulnerability:

  - Heap-based buffer overflow vulnerability in     extract_status_code() function in lib/html.c that parses     HTTP status code returned from web server allows     malicious web server or man-in-the-middle attacker     pretending to be a web server to cause either a denial     of service or potentially execute arbitrary code on     keepalived load balancer. (CVE-2018-19115)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the version of the keepalived package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - Heap-based buffer overflow vulnerability in     extract_status_code() function in lib/html.c that     parses HTTP status code returned from web server allows     malicious web server or man-in-the-middle attacker     pretending to be a web server to cause either a denial     of service or potentially execute arbitrary code on     keepalived load balancer.(CVE-2018-19115)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 7 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2019-0022 advisory.

    [1.3.5-8]
    - Fixed patch that was incorrectly removed (#1652694)

    [1.3.5-7]
    - Fix buffer overflow when parsing HTTP status codes (#1652694)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Security Fix(es) :

  - keepalived: Heap-based buffer overflow when parsing HTTP     status codes allows for denial of service or possibly     arbitrary code execution (CVE-2018-19115)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - keepalived before 2.0.7 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS     or possibly unspecified other impact, because extract_status_code in lib/html.c has no validation of the     status code and instead writes an unlimited amount of data to the heap. (CVE-2018-19115)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
125543	Ubuntu 16.04 LTS / 18.04 LTS：Keepalived 弱點 (USN-3995-1)	Nessus	Ubuntu Local Security Checks	2019/5/29	2024/8/27	critical
127235	NewStart CGSL CORE 5.04 / MAIN 5.04：keepalived 弱點 (NS-SA-2019-0051)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2021/1/14	critical
125543	Ubuntu 16.04 LTS / 18.04 LTS : Keepalived vulnerability (USN-3995-1)	Nessus	Ubuntu Local Security Checks	2019/5/29	2024/8/27	critical
127007	EulerOS 2.0 SP8 : keepalived (EulerOS-SA-2019-1770)	Nessus	Huawei Local Security Checks	2019/7/25	2024/5/8	critical
127235	NewStart CGSL CORE 5.04 / MAIN 5.04 : keepalived Vulnerability (NS-SA-2019-0051)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2021/1/14	critical
129237	EulerOS 2.0 SP3 : keepalived (EulerOS-SA-2019-2044)	Nessus	Huawei Local Security Checks	2019/9/24	2024/4/23	critical
120975	Oracle Linux 7 : keepalived (ELSA-2019-0022)	Nessus	Oracle Linux Local Security Checks	2019/1/7	2024/10/22	critical
120980	Scientific Linux Security Update : keepalived on SL7.x x86_64 (20190103)	Nessus	Scientific Linux Local Security Checks	2019/1/7	2024/6/27	critical
222183	Linux Distros Unpatched Vulnerability : CVE-2018-19115	Nessus	Misc.	2025/3/4	2025/3/4	critical

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