Vulnerability in libical

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/libical/libical
• github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/ic…
• github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de
• github.com/libical/libical/pull/1455
• hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read
• www.vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-icalvalu…