Description (CNA)
Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack. S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds. A template derived from untrusted input can read heap memory past the buffer and return it to the caller.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Not supplied / Not supplied | affected 0 before 5.40.5-RC1; affected 5.41.0 before 5.42.3-RC1; affected 5.43.0 before 5.43.11 |
CWE
CWE-190, CWE-125
References
- https://github.com/Perl/perl5/commit/5f7eb6bbbe0510964e3fb1d6bb691e5445913e55.patch
- https://github.com/Perl/perl5/commit/40754edc72dd3e513d758153c0e2f0215897740e.patch
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.