An update for keepalived is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The keepalived utility provides simple and robust facilities for load balancing and high availability. The load balancing framework relies on the well-known and widely used IP Virtual Server (IPVS) kernel module providing layer-4 (transport layer) load balancing. Keepalived implements a set of checkers to dynamically and adaptively maintain and manage a load balanced server pool according to the health of the servers. Keepalived also implements the Virtual Router Redundancy Protocol (VRRPv2) to achieve high availability with director failover.

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)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

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.

The remote Redhat Enterprise Linux 7 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2019:0022 advisory.

    The keepalived utility provides simple and robust facilities for load balancing and high availability. The     load balancing framework relies on the well-known and widely used IP Virtual Server (IPVS) kernel module     providing layer-4 (transport layer) load balancing. Keepalived implements a set of checkers to dynamically     and adaptively maintain and manage a load balanced server pool according to the health of the servers.
    Keepalived also implements the Virtual Router Redundancy Protocol (VRRPv2) to achieve high availability     with director failover.

    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)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

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.

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.

USN-3995-1 fixed a vulnerability in keepalived. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details :

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.

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

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

  - keepalived 2.0.8 didn't check for pathnames with     symlinks when writing data to a temporary file upon a     call to PrintData or PrintStats. This allowed local     users to overwrite arbitrary files if     fs.protected_symlinks is set to 0, as demonstrated by a     symlink from /tmp/keepalived.data or     /tmp/keepalived.stats to /etc/passwd.(CVE-2018-19044)

  - 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 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.

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 MiracleLinux 7 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2019-3747:01 advisory.

    [Security Fix]
    - keepalived     DoS(CVE-2018-19115)     CVEJVNhttp://jvndb.jvn.jp/

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

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

ID	名稱	產品	系列	已發布	已更新	嚴重性
120956	CentOS 7 : keepalived (CESA-2019:0022)	Nessus	CentOS Local Security Checks	2019/1/7	2020/2/26	critical
120975	Oracle Linux 7 : keepalived (ELSA-2019-0022)	Nessus	Oracle Linux Local Security Checks	2019/1/7	2024/10/22	critical
120979	RHEL 7 : keepalived (RHSA-2019:0022)	Nessus	Red Hat Local Security Checks	2019/1/7	2024/11/6	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
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
125544	Ubuntu 14.04 LTS : keepalived vulnerability (USN-3995-2)	Nessus	Ubuntu Local Security Checks	2019/5/29	2024/5/17	critical
135655	EulerOS Virtualization 3.0.2.2 : keepalived (EulerOS-SA-2020-1493)	Nessus	Huawei Local Security Checks	2020/4/16	2024/3/15	critical
129237	EulerOS 2.0 SP3 : keepalived (EulerOS-SA-2019-2044)	Nessus	Huawei Local Security Checks	2019/9/24	2024/4/23	critical
289058	MiracleLinux 7 : keepalived-1.3.5-8.el7 (AXSA:2019-3747:01)	Nessus	Miracle Linux Local Security Checks	2026/1/16	2026/1/16	critical

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