Vulnerability Details : CVE-2018-20655
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.
Vulnerability category: Memory Corruption
Exploit prediction scoring system (EPSS) score for CVE-2018-20655
Probability of exploitation activity in the next 30 days: 0.44%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 72 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2018-20655
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2018-20655
-
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: cve-assign@fb.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-20655
-
http://www.securityfocus.com/bid/108805
WhatsApp CVE-2018-20655 Stack Buffer Overflow VulnerabilityThird Party Advisory;VDB Entry
-
https://www.facebook.com/security/advisories/cve-2018-20655/
FacebookThird Party Advisory
Products affected by CVE-2018-20655
- cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*
- cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:business:iphone_os:*:*