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Advisories

Viber for iOS through 29.4.0.24 Denial of Service via Malformed GIF

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Severity
medium
Date
Affecting

  • Viber for iOS <= 29.4.0.24

CWE
  • CWE-248 Uncaught Exception
CVSS
5.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
Gjoko Krstic
Description
Viber for iOS through 29.4.0.24 fails to validate the logical screen width and height in received GIF headers, allowing attackers to crash the app. Attackers can send a crafted GIF with zero dimensions that triggers an uncaught NSInternalInconsistencyException, aborting the app with SIGABRT when opened.

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