VDB-136498 · CVE-2018-20655 · BID 108805

Facebook WhatsApp up to 2.18 on iOS Packet Call memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Facebook WhatsApp up to 2.18 on iOS. Affected is an unknown function of the component Packet Handler. Executing a manipulation as part of Call can lead to memory corruption. This vulnerability appears as CVE-2018-20655. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Facebook WhatsApp up to 2.18 on iOS (Social Network Software) and classified as critical. This vulnerability affects an unknown code block of the component Packet Handler. The manipulation as part of a Call leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

When receiving calls using WhatsApp for iOS, a missing size check when parsing a sender-provided packet allowed for a stack-based overflow. This issue affects WhatsApp for iOS prior to v2.18.90.24 and WhatsApp Business for iOS prior to v2.18.90.24.

The weakness was presented 06/14/2019 (Website). The advisory is available at securityfocus.com. This vulnerability was named CVE-2018-20655 since 01/02/2019. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 2.18.90.24 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: WhatsApp 2.18.90.24

Timelineinfo

01/02/2019 🔍
06/14/2019 +163 days 🔍
06/15/2019 +1 days 🔍
09/03/2025 +2272 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed

CVE: CVE-2018-20655 (🔍)
GCVE (CVE): GCVE-0-2018-20655
GCVE (VulDB): GCVE-100-136498
SecurityFocus: 108805

Entryinfo

Created: 06/15/2019 12:36
Updated: 09/03/2025 20:11
Changes: 06/15/2019 12:36 (59), 06/24/2020 13:07 (1), 10/05/2023 11:35 (4), 09/03/2025 20:11 (17)
Complete: 🔍
Cache ID: 216::103

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