Описание
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
| Релиз | Статус | Примечание |
|---|---|---|
| devel | released | 9.9p1-3ubuntu3 |
| esm-infra-legacy/trusty | not-affected | code not present |
| esm-infra/bionic | released | 1:7.6p1-4ubuntu0.7+esm4 |
| esm-infra/focal | released | 1:8.2p1-4ubuntu0.12 |
| esm-infra/xenial | released | 1:7.2p2-4ubuntu2.10+esm7 |
| fips-preview/jammy | needed | |
| fips-updates/bionic | released | 1:7.9p1-10~ubuntu18.04.fips.0.10 |
| fips-updates/focal | released | 1:8.2p1-4ubuntu0.fips.0.12 |
| fips-updates/jammy | released | 1:8.9p1-3ubuntu0.11+Fips1 |
| fips-updates/noble | released | 1:9.6p1-3ubuntu13.12+Fips1 |
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| Релиз | Статус | Примечание |
|---|---|---|
| devel | ignored | |
| esm-apps/bionic | ignored | |
| esm-apps/focal | ignored | |
| esm-apps/jammy | ignored | |
| esm-apps/noble | ignored | |
| focal | ignored | |
| jammy | ignored | |
| noble | ignored | |
| oracular | ignored | |
| plucky | ignored |
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6.8 Medium
CVSS3
Связанные уязвимости
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
Openssh: machine-in-the-middle attack if verifyhostkeydns is enabled
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option ...
6.8 Medium
CVSS3