In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - limit RX SG extraction by receive buffer budget
Make af_alg_get_rsgl() limit each RX scatterlist extraction to the
remaining receive buffer budget.
af_alg_get_rsgl() currently uses af_alg_readable() only as a gate
before extracting data into the RX scatterlist. Limit each extraction
to the remaining af_alg_rcvbuf(sk) budget so that receive-side
accounting matches the amount of data attached to the request.
If skcipher cannot obtain enough RX space for at least one chunk while
more data remains to be processed, reject the recvmsg call instead of
rounding the request length down to zero.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Vulnerable Products 11
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
4.14
|
6.12.83
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
4.14
|
6.18.24
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
4.14
|
6.19.14
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
4.14
|
7.0
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
|
— | — |
References 5
https://git.kernel.org/stable/c/9bf3e6ccfdcfe56ae3190d1ae987dacf1cfef4f9
NVD
https://git.kernel.org/stable/c/07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453
NVD
https://git.kernel.org/stable/c/4a264b2614c73c96666e196bbabe0cead52bdba7
NVD
https://git.kernel.org/stable/c/8eceab19eba9dcbfd2a0daec72e1bf48aa100170
NVD
https://git.kernel.org/stable/c/7e345de2e69475430af85e09210795d8eb8e719c
416baaa9-dc9f-4396-8d5f-8c081fb06d67