UBUNTU-CVE-2020-28588
An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
20 explicit affected versions
23 explicit affected versions
1 explicit affected versions
12 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
1 explicit affected versions
22 explicit affected versions
30 explicit affected versions
21 explicit affected versions
10 explicit affected versions
7 explicit affected versions
1 explicit affected versions
22 explicit affected versions
13 explicit affected versions
24 explicit affected versions
10 explicit affected versions
11 explicit affected versions
22 explicit affected versions
18 explicit affected versions
1 explicit affected versions
2 explicit affected versions
12 explicit affected versions
1 explicit affected versions
12 explicit affected versions
1 explicit affected versions
3 explicit affected versions
11 explicit affected versions
44 explicit affected versions
16 explicit affected versions
7 explicit affected versions
38 explicit affected versions
9 explicit affected versions
12 explicit affected versions
11 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
15 explicit affected versions
4 explicit affected versions
2 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/4f134b89a24b965991e7c345b9a4591821f7c2a6
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1211
- https://ubuntu.com/security/CVE-2020-28588
- https://ubuntu.com/security/notices/USN-4750-1
- https://ubuntu.com/security/notices/USN-4751-1
- https://ubuntu.com/security/notices/USN-4752-1
- https://www.cve.org/CVERecord?id=CVE-2020-28588