Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: w1: ds28e17: reject an oversize length on an I2C block read w1_f19_i2c_master_transfer() is the master_xfer for the DS28E17 1-Wire to I2C bridge. On an I2C_M_RECV_LEN read, it takes the length from the device. The downstream slave puts a length byte in buf[0]. The driver then reads that many bytes into buf[1] with w1_f19_i2c_read(). buf[0] is controlled by the device and can be 0 to 255. w1_f19_i2c_read() only rejects a zero count. The caller buffer is I2C_SMBUS_BLOCK_MAX + 2, so 34 bytes. A length above 32 makes the read run past it, up to about 222 bytes out of bounds. The SMBus core does check buf[0] against I2C_SMBUS_BLOCK_MAX. That check runs after master_xfer returns. By then the write is already done. i2c-algo-bit rejects an oversize length before it copies, and returns -EPROTO. Reject a length above I2C_SMBUS_BLOCK_MAX at both RECV_LEN sites, the same way i2c-algo-bit does.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before b30c021c6073559ea6851b522d8a17a524a27b4a; affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before 1d08877fc37e90945df38d255715bd1d6c052d46; affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before bf76d61e118b7044600a65775a3bf8adc2c6823d; affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before 0f6496b34cc2919420f303b2aabdd9f71e084b56; affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before cb55c5da9828f77db2a2701316949d4de1e9b773; affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before ae0c79a8527044e54d81fd5a3b49ce6177633758; affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before 6df05f630c84a109736642362e452089886f9974; affected ebc4768ac4971eab4b570e733e47ac9dfd0e4175 before 169ae5e65e5aaf213b6a578f6478a9fd2e523606 |
| Linux / Linux | affected 4.15; unaffected 0 before 4.15; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b30c021c6073559ea6851b522d8a17a524a27b4a
- https://git.kernel.org/stable/c/1d08877fc37e90945df38d255715bd1d6c052d46
- https://git.kernel.org/stable/c/bf76d61e118b7044600a65775a3bf8adc2c6823d
- https://git.kernel.org/stable/c/0f6496b34cc2919420f303b2aabdd9f71e084b56
- https://git.kernel.org/stable/c/cb55c5da9828f77db2a2701316949d4de1e9b773
- https://git.kernel.org/stable/c/ae0c79a8527044e54d81fd5a3b49ce6177633758
- https://git.kernel.org/stable/c/6df05f630c84a109736642362e452089886f9974
- https://git.kernel.org/stable/c/169ae5e65e5aaf213b6a578f6478a9fd2e523606