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GitHub_MCVELIST:CVE-2023-42818

HistorySep 27, 2023 - 8:28 p.m.

CVE-2023-42818 SSH public key login without private key challenge if mfa is enabled in jumpserver

2023-09-2720:28:30

CWE-287

GitHub_M

www.cve.org

cve-2023-42818; ssh public key login; mfa enabled; jumpserver; vulnerability; koko ssh server; patched; upgrade.

CVSS3

5.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

AI Score

9.7

Confidence

High

EPSS

0.001

Percentile

46.7%

JSON

JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.

CNA Affected

[
  {
    "vendor": "jumpserver",
    "product": "jumpserver",
    "versions": [
      {
        "version": ">= 3.6.0, < 3.6.5",
        "status": "affected"
      },
      {
        "version": "< 3.5.6",
        "status": "affected"
      }
    ]
  }
]

References

github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv

CVSS3

5.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

AI Score

9.7

Confidence

High

EPSS

0.001

Percentile

46.7%

JSON

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