In the Linux kernel, the following vulnerability has been resolved:
ecryptfs: pass packet set buffer size to parser
ecryptfs_parse_packet_set() receives a pointer into the file header, but
it calculates the remaining packet buffer size from PAGE_SIZE - 8. For
version 1 headers the packet set starts later in the header, so this can
overstate the available buffer. Pass the actual packet set buffer length from the caller and calculate
per-packet limits from the remaining bytes in that buffer.
Recompute the remaining length after consuming a tag 3 packet before parsing the following tag 11 packet.
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
High
Complete data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 8
https://git.kernel.org/stable/c/2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/329de8b9e988b152b938f09224670d97bada0b96
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/747fd45be396a6aea3420ab657a0ab4e60185b05
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e5d254e654f2311a3c4b9c791d7f216554bcd17a
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3bd9bb3e167a7c14a50423f6ff03ee0fb007199d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/66a87559ecb26afe80ad512faf728a158e2b81da
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/749fa08d8f1b318bd8f4669a14a8a4a8c1bbdaac
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e7573b0e3058c6bbdfe81673f22c09900fde9e65
416baaa9-dc9f-4396-8d5f-8c081fb06d67