The use of the RSA algorithm without OAEP, or any other padding scheme, in telnetd_startup, allows an unauthenticated attacker on the local area network to achieve a significant degree of control over the "plaintext" to which an arbitrary blob of ciphertext will be decrypted by OpenSSL's RSA_public_decrypt() function. This weakness allows the attacker to manipulate the various iterations of the telnetd startup state machine and eventually obtain a root shell on the device, by means of an exchange of crafted UDP packets. In all versions but K2 22.5.9.163 and K3C 32.1.15.93 a successful attack also requires the exploitation of a null-byte interaction error (CVE-2022-25219).
Metrics
Affected Vendors & Products
References
Link | Providers |
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https://www.tenable.com/security/research/tra-2022-01 |
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History
No history.
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Status: PUBLISHED
Assigner: tenable
Published:
Updated: 2024-08-03T04:36:06.287Z
Reserved: 2022-02-15T00:00:00
Link: CVE-2022-25218
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Status : Modified
Published: 2022-03-10T17:47:02.133
Modified: 2024-11-21T06:51:49.603
Link: CVE-2022-25218
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