Critical · published July 20, 2023
CVSS calls it critical at 9.8. It sits in the 99.6th percentile for exploit probability.
🔥 An insufficiently trusted search path in ssh-agent could lead to remote code execution, like a bouncer allowing anyone into a VIP lounge simply because they wore the right outfit! Imagine you’ve entrusted your valuables to a hotel with a shady reputation for letting in any guest who shows up at the door. The PKCS#11 feature in OpenSSH has become that sketchy hotel, letting attackers load potentially harmful code if your agent gets forwarded to their system. An attacker could exploit this vulnerability to run malicious code on your system, potentially allowing them to steal your data, manipulate your files, or gain full control over your environment. This is absolutely devastating for both individual users and organizations, as it could lead to severe data breaches or system compromises!
Imagine you’ve entrusted your valuables to a hotel with a shady reputation for letting in any guest who shows up at the door. The PKCS#11 feature in OpenSSH has become that sketchy hotel, letting attackers load potentially harmful code if your agent gets forwarded to their system. This vulnerability arises from an insufficiently trustworthy search path in ssh-agent, allowing remote attackers to exploit agent forwarding on compromised systems. Specifically, it stems from an incomplete fix for a previous vulnerability (CVE-2016-10009), leaving the door ajar for potential exploitation.
An attacker could exploit this vulnerability to run malicious code on your system, potentially allowing them to steal your data, manipulate your files, or gain full control over your environment. This is absolutely devastating for both individual users and organizations, as it could lead to severe data breaches or system compromises! Upgrade OpenSSH to version 9.3p2 or later to mitigate this vulnerability. Be cautious with agent forwarding and consider disabling it if it's not necessary for your use case. Regularly audit your systems to ensure that only safe and trusted paths are used for loading code. You've got this! By taking these steps, you can lock down your systems and keep them secure. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| openbsd/openssh | < 9.3 | 9.3 |
| openbsd/openssh | all versions | — |
| openbsd/openssh | all versions | — |
| fedoraproject/fedora | all versions | — |
| fedoraproject/fedora | all versions | — |