Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2023-25136

Disclosure Date: February 03, 2023
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Description

OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states “remote code execution is theoretically possible.”

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CVSS V3 Severity and Metrics
Base Score:
6.5 Medium
Impact Score:
4.2
Exploitability Score:
2.2
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
Low
Availability (A):
High

General Information

Vendors

  • fedoraproject,
  • netapp,
  • openbsd

Products

  • 500f firmware -,
  • a250 firmware -,
  • c250 firmware -,
  • fedora 37,
  • fedora 38,
  • ontap select deploy administration utility -,
  • openssh 9.1

References

Additional Info

Technical Analysis