UBUNTU-CVE-2020-11494
An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4.
02 / AFFECTED SOFTWARE
Affected packages
78 explicit affected versions
37 explicit affected versions
6 explicit affected versions
19 explicit affected versions
6 explicit affected versions
191 explicit affected versions
42 explicit affected versions
23 explicit affected versions
1 explicit affected versions
48 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
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15 explicit affected versions
10 explicit affected versions
23 explicit affected versions
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22 explicit affected versions
1 explicit affected versions
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6 explicit affected versions
40 explicit affected versions
1 explicit affected versions
19 explicit affected versions
23 explicit affected versions
2 explicit affected versions
11 explicit affected versions
80 explicit affected versions
2 explicit affected versions
43 explicit affected versions
47 explicit affected versions
109 explicit affected versions
51 explicit affected versions
1 explicit affected versions
56 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
67 explicit affected versions
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44 explicit affected versions
10 explicit affected versions
26 explicit affected versions
6 explicit affected versions
38 explicit affected versions
4 explicit affected versions
87 explicit affected versions
69 explicit affected versions
22 explicit affected versions
33 explicit affected versions
27 explicit affected versions
12 explicit affected versions
2 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4.
05 / REFERENCES
Further evidence
- https://github.com/richiejp/ltp/blob/pty-slcan/testcases/kernel/pty/pty04.c
- https://github.com/torvalds/linux/commit/b9258a2cece4ec1f020715fe3554bc2e360f6264
- https://lore.kernel.org/netdev/[email protected]/
- https://ubuntu.com/security/CVE-2020-11494
- https://ubuntu.com/security/notices/USN-4363-1
- https://ubuntu.com/security/notices/USN-4364-1
- https://ubuntu.com/security/notices/USN-4368-1
- https://ubuntu.com/security/notices/USN-4369-1
- https://usn.ubuntu.com/lsn/0067-1/
- https://www.cve.org/CVERecord?id=CVE-2020-11494