The encryption implementation in Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12…
Priority LOW 28CWE-310Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The encryption implementation in Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21 makes it easier for remote attackers to discover the plaintext content of VPN sessions by sniffing the network for ciphertext data and conducting an unspecified decryption attack.
Why it matters now
EPSS 0.02548 85th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 12
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:juniper:screenos:6.2.0r15:*:*:*:*:*:*:* | 6.2.0r15 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.2.0r16:*:*:*:*:*:*:* | 6.2.0r16 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.2.0r17:*:*:*:*:*:*:* | 6.2.0r17 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.2.0r18:*:*:*:*:*:*:* | 6.2.0r18 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.3.0:r12:*:*:*:*:*:* | 6.3.0 r12 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.3.0:r14:*:*:*:*:*:* | 6.3.0 r14 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.3.0:r15:*:*:*:*:*:* | 6.3.0 r15 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.3.0:r16:*:*:*:*:*:* | 6.3.0 r16 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.3.0:r17:*:*:*:*:*:* | 6.3.0 r17 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:screenos:6.3.0:r18:*:*:*:*:*:* | 6.3.0 r18 | Vulnerable | Juniper |
- cpe:2.3:o:juniper:screenos:6.2.0r15:*:*:*:*:*:*:* Versions 6.2.0r15 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.2.0r16:*:*:*:*:*:*:* Versions 6.2.0r16 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.2.0r17:*:*:*:*:*:*:* Versions 6.2.0r17 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.2.0r18:*:*:*:*:*:*:* Versions 6.2.0r18 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.3.0:r12:*:*:*:*:*:* Versions 6.3.0 r12 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.3.0:r14:*:*:*:*:*:* Versions 6.3.0 r14 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.3.0:r15:*:*:*:*:*:* Versions 6.3.0 r15 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.3.0:r16:*:*:*:*:*:* Versions 6.3.0 r16 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.3.0:r17:*:*:*:*:*:* Versions 6.3.0 r17 Vulnerable ·Juniper
- cpe:2.3:o:juniper:screenos:6.3.0:r18:*:*:*:*:*:* Versions 6.3.0 r18 Vulnerable ·Juniper
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-7756
- 2026-10-03 Alias added: GHSA-fq6r-qhq8-2958
References
Other 6
- http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/
- http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/
- https://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554
- https://github.com/hdm/juniper-cve-2015-7755
- https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
- http://www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/
More Juniper Screenos vulnerabilities
- TI-2015-06436 Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before… KEVCVSS 3.1CRITICAL 9.8
- TI-2017-01617 ScreenOS: XSS vulnerability in ScreenOS Firewall CVSS 3.0CRITICAL 9.6
- TI-2015-06435 Juniper ScreenOS before 6.3.0r21, when ssh-pka is configured and enabled, allows remote… CVSS 3.0HIGH 8.1
- TI-2014-02278 Juniper ScreenOS 6.3 and earlier allows remote attackers to cause a denial of service… CVSS 2.0HIGH 7.8
- TI-2017-01620 ScreenOS: XSS vulnerability in ScreenOS Firewall CVSS 3.0HIGH 8.4
- TI-2017-01619 ScreenOS: XSS vulnerability in ScreenOS Firewall CVSS 3.0HIGH 8.4
Sources
- CVE-2015-7756 · CVE Program
- CVE-2015-7756 · NVD
- FIRST EPSS
- GHSA-fq6r-qhq8-2958 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences