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Advisories

libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string

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Severity
medium
Date
Affecting

  • libical <= 4.0.6

CWE
  • CWE-125 Out-of-bounds Read
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
alepacheco, HaiND from the Post and Telecommunication Institute of Technology
Description
libical through 4.0.6 contains a heap-based out-of-bounds read in icalvalue_decode_ical_string() in src/libical/icalvalue.c when decoding input ending in a backslash. Attackers can supply escaped iCalendar text with a trailing backslash, causing the loop to read past the terminator and crash the application or leak adjacent heap memory.

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