CVE-2021-31352

SRC Series: NETCONF over SSH allows negotiation of weak ciphers

MEDIUM
5.3
CVSS Score
Published: October 19, 2021 at 06:16 PM UTC
Updated: June 17, 2026 at 03:51 AM UTC
2 products affected across 2 vendorsSession and Resource ControlSession and Resource Control

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.8%

Description

An Information Exposure vulnerability in Juniper Networks SRC Series devices configured for NETCONF over SSH permits the negotiation of weak ciphers, which could allow a remote attacker to obtain sensitive information. A remote attacker with read and write access to network data could exploit this vulnerability to display plaintext bits from a block of ciphertext and obtain sensitive information. This issue affects all Juniper Networks SRC Series versions prior to 4.13.0-R6.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.130r6
Affected range stops below 4.130r6, so it looks safe — our inference, not a vendor statement
v < 4.13.0-R6
Affected range stops below 4.13.0-R6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMExploitPatchVendor Advisory
https://kb.juniper.net/JSA11217

CVSS

5.3MEDIUMjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200CWE-327

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