WhatsApp VoIP RTCP Buffer Overflow RCE
CVE-2019-3568 is a buffer overflow in the WhatsApp VoIP stack that allowed remote code execution by sending a specially crafted series of RTCP packets to a target phone number during a WhatsApp call. The issue was exploitable in WhatsApp for Android prior to 2.19.134, WhatsApp Business for Android prior to 2.19.44, WhatsApp for iOS prior to 2.19.51, WhatsApp Business for iOS prior to 2.19.51, WhatsApp for Windows Phone prior to 2.18.348, and WhatsApp for Tizen prior to 2.18.15. The provided content describes the flaw as a zero-click issue in the calling/VoIP functionality: malicious call initiation traffic and RTCP data could inject code into device memory even if the target did not answer the call, after which additional spyware payloads could be downloaded and installed.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WhatsApp buffer overflow vulnerability enabling remote code execution via crafted RTCP packets, used to silently deliver NSO Group’s Pegasus spyware to targeted devices.
A WhatsApp vulnerability used by NSO Group to deliver Pegasus spyware, notably against Android phones, and patched by WhatsApp in 2019.
A zero-click remote code execution vulnerability in WhatsApp’s VoIP calling stack that enabled attackers to install NSO Group’s Pegasus spyware on targeted devices without user interaction.
A vulnerability in WhatsApp’s calling feature that enabled spyware injection (reported as usable even if the target did not answer the call), associated in the text with NSO’s Pegasus deployment activity and subsequent litigation.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.