UBUNTU-CVE-2022-2503
Dm-verity is used for extending root-of-trust to root filesystems. LoadPin builds on this property to restrict module/firmware loads to just the trusted root filesystem. Device-mapper table reloads currently allow users with root privileges to switch out the target with an equivalent dm-linear target and bypass verification till reboot. This allows root to bypass LoadPin and can be used to load untrusted and unverified kernel modules and firmware, which implies arbitrary kernel execution and persistence for peripherals that do not verify firmware updates. We recommend upgrading past commit 4caae58406f8ceb741603eee460d79bacca9b1b5
02 / AFFECTED SOFTWARE
Affected packages
3 explicit affected versions
8 explicit affected versions
50 explicit affected versions
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6 explicit affected versions
16 explicit affected versions
1 explicit affected versions
25 explicit affected versions
12 explicit affected versions
4 explicit affected versions
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10 explicit affected versions
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66 explicit affected versions
39 explicit affected versions
20 explicit affected versions
2 explicit affected versions
99 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
83 explicit affected versions
1 explicit affected versions
1 explicit affected versions
21 explicit affected versions
16 explicit affected versions
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2 explicit affected versions
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1 explicit affected versions
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1 explicit affected versions
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13 explicit affected versions
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13 explicit affected versions
1 explicit affected versions
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56 explicit affected versions
33 explicit affected versions
15 explicit affected versions
10 explicit affected versions
65 explicit affected versions
11 explicit affected versions
12 explicit affected versions
88 explicit affected versions
7 explicit affected versions
54 explicit affected versions
2 explicit affected versions
3 explicit affected versions
1 explicit affected versions
10 explicit affected versions
83 explicit affected versions
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5 explicit affected versions
13 explicit affected versions
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1 explicit affected versions
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12 explicit affected versions
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13 explicit affected versions
11 explicit affected versions
42 explicit affected versions
5 explicit affected versions
10 explicit affected versions
12 explicit affected versions
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16 explicit affected versions
13 explicit affected versions
37 explicit affected versions
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4 explicit affected versions
9 explicit affected versions
3 explicit affected versions
126 explicit affected versions
11 explicit affected versions
44 explicit affected versions
61 explicit affected versions
21 explicit affected versions
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73 explicit affected versions
4 explicit affected versions
29 explicit affected versions
8 explicit affected versions
64 explicit affected versions
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11 explicit affected versions
105 explicit affected versions
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44 explicit affected versions
4 explicit affected versions
33 explicit affected versions
1 explicit affected versions
20 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Dm-verity is used for extending root-of-trust to root filesystems. LoadPin builds on this property to restrict module/firmware loads to just the trusted root filesystem. Device-mapper table reloads currently allow users with root privileges to switch out the target with an equivalent dm-linear target and bypass verification till reboot. This allows root to bypass LoadPin and can be used to load untrusted and unverified kernel modules and firmware, which implies arbitrary kernel execution and persistence for peripherals that do not verify firmware updates. We recommend upgrading past commit 4caae58406f8ceb741603eee460d79bacca9b1b5
05 / REFERENCES
Further evidence
- https://github.com/google/security-research/security/advisories/GHSA-6vq3-w69p-w63m
- https://ubuntu.com/security/CVE-2022-2503
- https://ubuntu.com/security/notices/USN-5594-1
- https://ubuntu.com/security/notices/USN-5599-1
- https://ubuntu.com/security/notices/USN-5602-1
- https://ubuntu.com/security/notices/USN-5616-1
- https://ubuntu.com/security/notices/USN-5622-1
- https://ubuntu.com/security/notices/USN-5623-1
- https://ubuntu.com/security/notices/USN-5630-1
- https://ubuntu.com/security/notices/USN-5639-1
- https://ubuntu.com/security/notices/USN-5647-1
- https://ubuntu.com/security/notices/USN-5654-1
- https://ubuntu.com/security/notices/USN-5660-1
- https://ubuntu.com/security/notices/USN-6001-1
- https://ubuntu.com/security/notices/USN-6013-1
- https://ubuntu.com/security/notices/USN-6014-1
- https://www.cve.org/CVERecord?id=CVE-2022-2503