CVSS 7.5 · High EPSS 0,29%
Kerentanan Signed to Unsigned Conversion Error pada erlang/otp, erlang erts. Skor CVSS 3.1 7.5 (High) menurut NVD.
Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term format (ETF) binary to binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine. When decoding a LARGE_TUPLE_EXT term, the validation pass decoded_size() in erts/emulator/beam/external.c reads the 32-bit arity field as unsigned (get_uint32()), while the decode pass dec_term() reads the same field as a signed 32-bit integer (get_int32()) into an int. An arity wire value of 0x80000000 passes validation as 2147483648 but decodes as -2147483648, so the subsequent hp += n moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit MAX_ARITYVAL. The result is an out-of-bounds heap write; in practice the VM detects an impossible heap size and aborts, denying service. The required padding is large when uncompressed but the compressed-ETF envelope shrinks it to a small payload on the wire. This issue affects OTP from OTP 25.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to erts from 13.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| erlang | erlang/otp | Versi 25.0 hingga sebelum 27.3.4.15 |
| erlang | erlang/otp | Versi 28.0 hingga sebelum 28.5.0.4 |
| erlang | erlang/otp | Versi 29.0 hingga sebelum 29.0.4 |
| erlang | erts | Versi 13.0 hingga sebelum 15.2.7.11 |
| erlang | erts | Versi 16.0 hingga sebelum 16.4.0.4 |
| erlang | erts | Versi 17.0 hingga sebelum 17.0.4 |