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.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

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

  - 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)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

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 Redhat Enterprise Linux 7 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2019:1945 advisory.

  - keepalived: Heap-based buffer overflow when parsing HTTP status codes allows for denial of service or     possibly arbitrary code execution (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 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 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 Redhat Enterprise Linux 7 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2019:1792 advisory.

  - keepalived: Heap-based buffer overflow when parsing HTTP status codes allows for denial of service or     possibly arbitrary code execution (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 Virtualization for ARM 64 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.

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.

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.

The remote host is affected by the vulnerability described in GLSA-201903-01 (Keepalived: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in keepalived. Please       review the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could send a specially crafted request possibly       resulting in a Denial of Service condition. A local attacker could       perform symlink attacks to overwrite arbitrary files with the privileges       of the user running the application.
  Workaround :

    There is no known workaround at this time.

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)

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)

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.

Security fix for CVE-2018-19044, CVE-2018-19045, CVE-2018-19046, CVE-2018-19115

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

keepalived 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.

For Debian 8 'Jessie', this problem has been fixed in version 1:1.2.13-1+deb8u1.

We recommend that you upgrade your keepalived packages.

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

ID	Name	Product	Family	Severity
199776	RHEL 6 : keepalived (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
135655	EulerOS Virtualization 3.0.2.2 : keepalived (EulerOS-SA-2020-1493)	Nessus	Huawei Local Security Checks	critical
129237	EulerOS 2.0 SP3 : keepalived (EulerOS-SA-2019-2044)	Nessus	Huawei Local Security Checks	critical
127632	RHEL 7 : keepalived (RHSA-2019:1945)	Nessus	Red Hat Local Security Checks	critical
127235	NewStart CGSL CORE 5.04 / MAIN 5.04 : keepalived Vulnerability (NS-SA-2019-0051)	Nessus	NewStart CGSL Local Security Checks	critical
127007	EulerOS 2.0 SP8 : keepalived (EulerOS-SA-2019-1770)	Nessus	Huawei Local Security Checks	critical
126866	EulerOS 2.0 SP2 : keepalived (EulerOS-SA-2019-1739)	Nessus	Huawei Local Security Checks	critical
126760	RHEL 7 : keepalived (RHSA-2019:1792)	Nessus	Red Hat Local Security Checks	critical
126552	EulerOS Virtualization for ARM 64 3.0.2.0 : keepalived (EulerOS-SA-2019-1710)	Nessus	Huawei Local Security Checks	critical
126422	EulerOS 2.0 SP5 : keepalived (EulerOS-SA-2019-1680)	Nessus	Huawei Local Security Checks	critical
125544	Ubuntu 14.04 LTS : keepalived vulnerability (USN-3995-2)	Nessus	Ubuntu Local Security Checks	critical
125543	Ubuntu 16.04 LTS / 18.04 LTS : Keepalived vulnerability (USN-3995-1)	Nessus	Ubuntu Local Security Checks	critical
122729	GLSA-201903-01 : Keepalived: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
121367	Amazon Linux 2 : keepalived (ALAS-2019-1154)	Nessus	Amazon Linux Local Security Checks	critical
120980	Scientific Linux Security Update : keepalived on SL7.x x86_64 (20190103)	Nessus	Scientific Linux Local Security Checks	critical
120979	RHEL 7 : keepalived (RHSA-2019:0022)	Nessus	Red Hat Local Security Checks	critical
120975	Oracle Linux 7 : keepalived (ELSA-2019-0022)	Nessus	Oracle Linux Local Security Checks	critical
120956	CentOS 7 : keepalived (CESA-2019:0022)	Nessus	CentOS Local Security Checks	critical
120373	Fedora 29 : keepalived (2018-3fbc181b3e)	Nessus	Fedora Local Security Checks	critical
119152	Debian DLA-1589-1 : keepalived security update	Nessus	Debian Local Security Checks	critical

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