Vulnerability Details : CVE-2021-47244
In the Linux kernel, the following vulnerability has been resolved:
mptcp: Fix out of bounds when parsing TCP options
The TCP option parser in mptcp (mptcp_get_options) could read one byte
out of bounds. When the length is 1, the execution flow gets into the
loop, reads one byte of the opcode, and if the opcode is neither
TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the
length of 1.
This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack
out of bounds when parsing TCP options.").
Products affected by CVE-2021-47244
Please log in to view affected product information.
Exploit prediction scoring system (EPSS) score for CVE-2021-47244
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-47244
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.2
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.5
|
3.6
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 | 2024-11-05 |
References for CVE-2021-47244
-
https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037
mptcp: Fix out of bounds when parsing TCP options - kernel/git/stable/linux.git - Linux kernel stable tree
-
https://git.kernel.org/stable/c/73eeba71dc9932970befa009e68272a3d5ec4a58
mptcp: Fix out of bounds when parsing TCP options - kernel/git/stable/linux.git - Linux kernel stable tree
-
https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7
mptcp: Fix out of bounds when parsing TCP options - kernel/git/stable/linux.git - Linux kernel stable tree
Jump to