Golang Org X Crypto Ssh Agent
Monthly
Constraint extension stripping in the golang.org/x/crypto SSH agent client (versions prior to 0.52.0) allows remote SSH hosts to use forwarded keys without the destination restrictions the user intended. When clients added keys to a remote agent, extensions such as restrict-destination-v00@openssh.com were silently dropped during serialization, effectively converting scoped keys into unrestricted ones on downstream hosts. No public exploit identified at time of analysis and EPSS is very low (0.02%), but SSVC rates technical impact as total and automatable.
Authentication bypass in Go's golang.org/x/crypto/ssh/agent in-memory keyring (versions before 0.52.0) allows SSH key signing operations to proceed without the intended ConfirmBeforeUse user confirmation prompt. Applications that relied on this constraint to gate sensitive signing actions effectively had no protection, with no error returned to indicate the constraint was silently ignored. No public exploit identified at time of analysis and EPSS is very low (0.02%), but SSVC rates technical impact as total.
Panic-induced denial of service in the golang.org/x/crypto/ssh/agent package allows remote unauthenticated attackers to crash processes by submitting specially crafted SSH agent protocol messages containing malformed wire-format bytes that are unsafely cast into an ed25519.PrivateKey without sufficient validation. All versions of golang.org/x/crypto/ssh/agent prior to 0.52.0 are affected. No public exploit exists at time of analysis (EPSS 0.02%), though the SSVC framework flags the attack as automatable, and a vendor patch is available.
Constraint extension stripping in the golang.org/x/crypto SSH agent client (versions prior to 0.52.0) allows remote SSH hosts to use forwarded keys without the destination restrictions the user intended. When clients added keys to a remote agent, extensions such as restrict-destination-v00@openssh.com were silently dropped during serialization, effectively converting scoped keys into unrestricted ones on downstream hosts. No public exploit identified at time of analysis and EPSS is very low (0.02%), but SSVC rates technical impact as total and automatable.
Authentication bypass in Go's golang.org/x/crypto/ssh/agent in-memory keyring (versions before 0.52.0) allows SSH key signing operations to proceed without the intended ConfirmBeforeUse user confirmation prompt. Applications that relied on this constraint to gate sensitive signing actions effectively had no protection, with no error returned to indicate the constraint was silently ignored. No public exploit identified at time of analysis and EPSS is very low (0.02%), but SSVC rates technical impact as total.
Panic-induced denial of service in the golang.org/x/crypto/ssh/agent package allows remote unauthenticated attackers to crash processes by submitting specially crafted SSH agent protocol messages containing malformed wire-format bytes that are unsafely cast into an ed25519.PrivateKey without sufficient validation. All versions of golang.org/x/crypto/ssh/agent prior to 0.52.0 are affected. No public exploit exists at time of analysis (EPSS 0.02%), though the SSVC framework flags the attack as automatable, and a vendor patch is available.