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Heartbleed Exploitation ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 2 min read * ![Profile Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-profile-grey.svg) By: * [Ryan Olson](https://unit42.paloaltonetworks.com/author/ryan-olson/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:August 20, 2014 * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-category.svg) Categories: * [Malware](https://unit42.paloaltonetworks.com/category/malware/) * [Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) * [Vulnerabilities](https://unit42.paloaltonetworks.com/category/vulnerabilities/) * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-tags-grey.svg) Tags: * [Community Health Systems](https://unit42.paloaltonetworks.com/tag/community-health-systems/) * [CVE-2014-0160](https://unit42.paloaltonetworks.com/tag/cve-2014-0160/) * [Heartbleed](https://unit42.paloaltonetworks.com/tag/heartbleed/) * [OpenSSL](https://unit42.paloaltonetworks.com/tag/openssl/) * [TrustedSec](https://unit42.paloaltonetworks.com/tag/trustedsec/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/examining-chs-breach-heartbleed-exploitation/?pdf=download&lg=en&_wpnonce=7faf0ddf08 "Click here to download") * [![Print Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-print.svg)](https://unit42.paloaltonetworks.com/examining-chs-breach-heartbleed-exploitation/?pdf=print&lg=en&_wpnonce=7faf0ddf08 "Click here to print") Share![Down arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/down-arrow.svg) * ![Link 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Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-linkedin-share.svg)](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Fexamining-chs-breach-heartbleed-exploitation%2F&title=Examining%20the%20CHS%20Breach%20and%20Heartbleed%20Exploitation "Share in LinkedIn") * [![Twitter Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-twitter-share.svg)](https://twitter.com/intent/tweet?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Fexamining-chs-breach-heartbleed-exploitation%2F&text=Examining%20the%20CHS%20Breach%20and%20Heartbleed%20Exploitation "Share in Twitter") * [![Reddit Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-reddit-share.svg)](https://www.paloaltonetworks.com//www.reddit.com/submit?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Fexamining-chs-breach-heartbleed-exploitation%2F&ts=markdown "Share in Reddit") * [![Mastodon Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-mastodon-share.svg)](https://mastodon.social/share?text=Examining%20the%20CHS%20Breach%20and%20Heartbleed%20Exploitation%20https%3A%2F%2Funit42.paloaltonetworks.com%2Fexamining-chs-breach-heartbleed-exploitation%2F "Share in Mastodon") Yesterday, [TrustedSec](https://www.trustedsec.com/august-2014/chs-hacked-heartbleed-exclusive-trustedsec/), a security consultancy based on Ohio, wrote that the recent breach at Community Health Systems (CHS) was the result of exploitation of the [Heartbleed](https://blog.paloaltonetworks.com/tag/heartbleed/) OpenSSL vulnerability (CVE-2014-0160). CHS's [8-K filing](https://phx.corporate-ir.net/phoenix.zhtml?c=120730&p=irol-SECText&TEXT=aHR0cDovL2FwaS50ZW5rd2l6YXJkLmNvbS9maWxpbmcueG1sP2lwYWdlPTk3NjE4NTImRFNFUT0wJlNFUT0wJlNRREVTQz1TRUNUSU9OX0VOVElSRSZzdWJzaWQ9NTc%3d) on Monday did not reveal how the attackers got into their network, only that the records of approximately 4.5 million patients were stolen in attacks in between April and June of 2014. TrustedSec reports on how attackers were apparently able to glean user credentials from a certain device via the Heartbleed vulnerability and use them to log in via a VPN. We need more facts to be sure, but this instance may be the first public breach related to the Heartbleed vulnerability since it was [announced](https://heartbleed.com/) in April. Now, over four months since the Heartbleed disclosure, this attack reminds us of how serious this vulnerability is and how critical protection against it remains. As Heartbleed allows the attacker to scrape memory from the vulnerable device, they can retrieve significant amounts of secret information. In this case, that apparently included VPN credentials, which they then used to log into the network and more laterally from system to system until discovering the data they were after. While most vendors released patches for their products months ago it remains up to the users and administrators to ensure those patches are deployed. As the OpenSSL library is so widely used, some administrators may be finding unpatched systems for years to come. While network-based defenses are not a substitute for patching software, Heartbleed is detectable using IPS signatures. Palo Alto Networks deployed five signatures in April to defend against this threat, [40039](https://threatvault.paloaltonetworks.com/Home/ThreatDetail/40039), [36420](https://threatvault.paloaltonetworks.com/Home/ThreatDetail/36420), [36419](https://threatvault.paloaltonetworks.com/Home/ThreatDetail/36419), [36418](https://threatvault.paloaltonetworks.com/Home/ThreatDetail/36418) and [36416](https://threatvault.paloaltonetworks.com/Home/ThreatDetail/36416). No matter how well patched your systems are, there's no reason not to deploy IPS signatures like these to detect and block attempted Heartbleed exploits. If you've already deployed signatures and your logs are showing attempted exploits, consider blocking or monitoring the IP addresses sending the requests. A Heartbleed probe could be evidence of the early stages of an attack on your network, and persistent attackers are unlikely to give up after jiggling the handle on the front door. ### For more on Heartbleed * [Palo Alto Networks Addresses Heartbleed Vulnerability (CVE-2014-0160)](https://blog.paloaltonetworks.com/2014/04/palo-alto-networks-addresses-heartbleed-vulnerability-cve-2014-0160/) * [Real-world Impact of Heartbleed (CVE-2014-0160): The Web is Just the Start](https://blog.paloaltonetworks.com/2014/04/real-world-impact-heartbleed-cve-2014-0160-web-just-start/) * [8 Tips For Dealing With Heartbleed](https://blog.paloaltonetworks.com/2014/04/8-tips-dealing-heartbleed/) * [Protecting Vulnerable Clients from Reverse-Heartbleed](https://blog.paloaltonetworks.com/2014/04/protecting-vulnerable-clients-from-reverse-heartbleed/) Back to top ### Tags * [Community Health Systems](https://unit42.paloaltonetworks.com/tag/community-health-systems/ "Community Health Systems") * [CVE-2014-0160](https://unit42.paloaltonetworks.com/tag/cve-2014-0160/ "CVE-2014-0160") * [Heartbleed](https://unit42.paloaltonetworks.com/tag/heartbleed/ "Heartbleed") * [OpenSSL](https://unit42.paloaltonetworks.com/tag/openssl/ "OpenSSL") * [TrustedSec](https://unit42.paloaltonetworks.com/tag/trustedsec/ "TrustedSec") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: Insecure Internal Storage in Android](https://unit42.paloaltonetworks.com/insecure-internal-storage-android/ "Insecure Internal Storage in Android") ### Related Articles * [Threat Brief: CVE-2022-3786 and CVE-2022-3602: OpenSSL X.509 Buffer Overflows](https://unit42.paloaltonetworks.com/openssl-vulnerabilities/ "article - table of contents") * [Code to Trigger MS14-066 ECDSA Server BOF Vulnerability](https://unit42.paloaltonetworks.com/code-trigger-ms14-066-ecdsa-server-bof-vulnerability/ "article - table of contents") * [8 Tips For Dealing With Heartbleed Right Now](https://unit42.paloaltonetworks.com/8-tips-dealing-heartbleed/ "article - table of contents") ## Related Resources ![Pictorial representation of a magnifying glass illuminating a glowing orange circular digital circuit interface on a dark, high-tech background.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/09/04_Myth-Busting_Overview_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/08/Insights-icon-white.svg)Insights](https://unit42.paloaltonetworks.com/category/insights/) September 16, 2026 [#### Atomic macOS (AMOS) Stealer Activity](https://unit42.paloaltonetworks.com/atomic-macos-amos-stealer-activity/) * [MacOS](https://unit42.paloaltonetworks.com/tag/macos/ "macOS") * [Threat intelligence](https://unit42.paloaltonetworks.com/tag/threat-intelligence/ "threat intelligence") * [Unit 42](https://unit42.paloaltonetworks.com/tag/unit-42/ "Unit 42") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/atomic-macos-amos-stealer-activity/ "Atomic macOS (AMOS) Stealer Activity") ![Pictorial representation of post-exploitation identity misuse in SPIFFE/SPIRE. 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