UBUNTU-CVE-2024-42098
In the Linux kernel, the following vulnerability has been resolved: crypto: ecdh - explicitly zeroize private_key private_key is overwritten with the key parameter passed in by the caller (if present), or alternatively a newly generated private key. However, it is possible that the caller provides a key (or the newly generated key) which is shorter than the previous key. In that scenario, some key material from the previous key would not be overwritten. The easiest solution is to explicitly zeroize the entire private_key array first. Note that this patch slightly changes the behavior of this function: previously, if the ecc_gen_privkey failed, the old private_key would remain. Now, the private_key is always zeroized. This behavior is consistent with the case where params.key is set and ecc_is_key_valid fails.
02 / AFFECTED SOFTWARE
Affected packages
53 explicit affected versions
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26 explicit affected versions
41 explicit affected versions
37 explicit affected versions
15 explicit affected versions
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43 explicit affected versions
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88 explicit affected versions
14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
11 explicit affected versions
1 explicit affected versions
69 explicit affected versions
123 explicit affected versions
8 explicit affected versions
11 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: crypto: ecdh - explicitly zeroize private_key private_key is overwritten with the key parameter passed in by the caller (if present), or alternatively a newly generated private key. However, it is possible that the caller provides a key (or the newly generated key) which is shorter than the previous key. In that scenario, some key material from the previous key would not be overwritten. The easiest solution is to explicitly zeroize the entire private_key array first. Note that this patch slightly changes the behavior of this function: previously, if the ecc_gen_privkey failed, the old private_key would remain. Now, the private_key is always zeroized. This behavior is consistent with the case where params.key is set and ecc_is_key_valid fails.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/73e5984e540a76a2ee1868b91590c922da8c24c9
- https://git.kernel.org/stable/c/39173b04abda87872b43c331468a4a14f8f05ce8
- https://git.kernel.org/stable/c/73e5984e540a76a2ee1868b91590c922da8c24c9
- https://git.kernel.org/stable/c/80575b252ab0358b7e93895b2a510beb3cb3f975
- https://git.kernel.org/stable/c/d96187eb8e59b572a8e6a68b6a9837a867ea29df
- https://git.kernel.org/stable/c/fd7ef325911eba1b7191b83cb580463242f2090d
- https://ubuntu.com/security/CVE-2024-42098
- 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-7009-1
- https://ubuntu.com/security/notices/USN-7009-2
- https://ubuntu.com/security/notices/USN-7019-1
- https://ubuntu.com/security/notices/USN-7089-1
- https://ubuntu.com/security/notices/USN-7089-2
- https://ubuntu.com/security/notices/USN-7089-3
- https://ubuntu.com/security/notices/USN-7089-4
- https://ubuntu.com/security/notices/USN-7089-5
- https://ubuntu.com/security/notices/USN-7089-6
- https://ubuntu.com/security/notices/USN-7089-7
- https://ubuntu.com/security/notices/USN-7090-1
- https://ubuntu.com/security/notices/USN-7095-1
- https://ubuntu.com/security/notices/USN-7156-1
- https://www.cve.org/CVERecord?id=CVE-2024-42098