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CVE-2019-3568

WhatsApp VOIP Stack Buffer Overflow

9.8 CRITICALActively exploited (CISA KEV)EPSS 30.1%
  1. Published14 May 2019
  2. Added to CISA KEV19 Apr 2022
  3. Remediation due10 May 2022
Actively exploited (CISA KEV)

A buffer overflow vulnerability in WhatsApp VOIP stack allowed remote code execution via specially crafted series of RTCP packets sent to a target phone number.

Added to KEV: 19 Apr 2022Federal remediation due: 10 May 2022

Description

A buffer overflow vulnerability in WhatsApp VOIP stack allowed remote code execution via specially crafted series of RTCP packets sent to a target phone number. The issue affects WhatsApp for Android prior to v2.19.134, WhatsApp Business for Android prior to v2.19.44, WhatsApp for iOS prior to v2.19.51, WhatsApp Business for iOS prior to v2.19.51, WhatsApp for Windows Phone prior to v2.18.348, and WhatsApp for Tizen prior to v2.18.15.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Whatsapp< 2.19.134 · < 2.19.51 · < 2.18.15 · < 2.18.348
Whatsapp Business< 2.19.44 · < 2.19.51

Remediation

Fixed in
Whatsapp≥ 2.19.134
Whatsapp Business≥ 2.19.44

References

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Frequently asked

Is CVE-2019-3568 being actively exploited?

Yes. CVE-2019-3568 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 19 Apr 2022.

How severe is CVE-2019-3568?

CVE-2019-3568 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 30.1% probability of exploitation.

Which products are affected by CVE-2019-3568?

Affected products include Whatsapp, Whatsapp Business.

How do I fix CVE-2019-3568?

Upgrade affected software to a fixed version, for example Whatsapp 2.19.134, Whatsapp Business 2.19.44 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-3568 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.