CVE-2021-31352

CVE-2021-31352 is a medium-severity vulnerability in Juniper Session And Resource Control with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-327.

Key facts

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.

Frequently asked questions

What is CVE-2021-31352?
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.
How severe is CVE-2021-31352?
CVE-2021-31352 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-31352 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31352?
CVE-2021-31352 affects Juniper Session And Resource Control. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31352?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31352 published?
CVE-2021-31352 was published on 2021-10-19 and last updated on 2026-06-17.

References

Affected products (1)

More vulnerabilities in Juniper Session And Resource Control

All CVEs affecting Juniper Session And Resource Control →

Other CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) vulnerabilities

Browse all CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) vulnerabilities →