UBUNTU-CVE-2024-39480
In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use strncpy() to insert the completed symbol into the command buffer. Unfortunately it passes the size of the source buffer rather than the destination to strncpy() with predictably horrible results. Most obviously if the command buffer is already full but cp, the cursor position, is in the middle of the buffer, then we will write past the end of the supplied buffer. Fix this by replacing the dubious strncpy() calls with memmove()/memcpy() calls plus explicit boundary checks to make sure we have enough space before we start moving characters around.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
35 explicit affected versions
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2 explicit affected versions
42 explicit affected versions
36 explicit affected versions
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26 explicit affected versions
11 explicit affected versions
29 explicit affected versions
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116 explicit affected versions
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47 explicit affected versions
7 explicit affected versions
71 explicit affected versions
46 explicit affected versions
10 explicit affected versions
13 explicit affected versions
12 explicit affected versions
82 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
41 explicit affected versions
37 explicit affected versions
12 explicit affected versions
14 explicit affected versions
38 explicit affected versions
44 explicit affected versions
9 explicit affected versions
44 explicit affected versions
11 explicit affected versions
4 explicit affected versions
52 explicit affected versions
7 explicit affected versions
25 explicit affected versions
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54 explicit affected versions
120 explicit affected versions
99 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
50 explicit affected versions
92 explicit affected versions
13 explicit affected versions
43 explicit affected versions
48 explicit affected versions
143 explicit affected versions
10 explicit affected versions
8 explicit affected versions
7 explicit affected versions
14 explicit affected versions
83 explicit affected versions
4 explicit affected versions
72 explicit affected versions
11 explicit affected versions
1 explicit affected versions
46 explicit affected versions
5 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use strncpy() to insert the completed symbol into the command buffer. Unfortunately it passes the size of the source buffer rather than the destination to strncpy() with predictably horrible results. Most obviously if the command buffer is already full but cp, the cursor position, is in the middle of the buffer, then we will write past the end of the supplied buffer. Fix this by replacing the dubious strncpy() calls with memmove()/memcpy() calls plus explicit boundary checks to make sure we have enough space before we start moving characters around.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/e9730744bf3af04cda23799029342aa3cddbc454
- https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5
- https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7
- https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96
- https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8a
- https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454
- https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33
- https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7
- https://git.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992
- https://ubuntu.com/security/CVE-2024-39480
- https://ubuntu.com/security/notices/USN-6951-1
- https://ubuntu.com/security/notices/USN-6951-2
- https://ubuntu.com/security/notices/USN-6951-3
- https://ubuntu.com/security/notices/USN-6951-4
- https://ubuntu.com/security/notices/USN-6953-1
- https://ubuntu.com/security/notices/USN-6979-1
- https://ubuntu.com/security/notices/USN-6999-1
- https://ubuntu.com/security/notices/USN-6999-2
- https://ubuntu.com/security/notices/USN-7004-1
- https://ubuntu.com/security/notices/USN-7005-1
- https://ubuntu.com/security/notices/USN-7005-2
- https://ubuntu.com/security/notices/USN-7007-1
- https://ubuntu.com/security/notices/USN-7007-2
- https://ubuntu.com/security/notices/USN-7007-3
- https://ubuntu.com/security/notices/USN-7008-1
- https://ubuntu.com/security/notices/USN-7009-1
- https://ubuntu.com/security/notices/USN-7009-2
- https://ubuntu.com/security/notices/USN-7019-1
- https://ubuntu.com/security/notices/USN-7028-1
- https://ubuntu.com/security/notices/USN-7028-2
- https://ubuntu.com/security/notices/USN-7029-1
- https://www.cve.org/CVERecord?id=CVE-2024-39480