HTTP: Apple macOS FontParser Type 1 Font SpecialEncoding Out-Of-Bounds Write
This signature detects attempts to exploit a known vulnerability against Apple macOS FontParser. A successful attack can lead to a buffer overflow and arbitrary remote code execution within the context of the server.
Short Name
HTTP:OVERFLOW:APPLE-FONT-PRSR
Severity
Major
Recommended
True
Recommended Action
Drop
Category
HTTP
Keywords
1 Apple CVE-2025-43400 Font FontParser Out-Of-Bounds SpecialEncoding Type Write macOS
Release Date
03/04/2026
Supported Platforms
mx-19.3
vmx-19.3
vsrx-19.2
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vmx-19.4
mx-19.4
srxevo-25.4
vsrx-26.2
srx-26.2
srx-branch-26.2
vsrx3bsd-26.2
mx-12.3
srx-12.3
srx-branch-12.3
vsrx-12.3
Sigpack Version
3888
False Positive
Unknown