CVE-2020-5926
HIGHCVSS 7.5/10EPSS 1.04%
Last modified
CVE-2020-5926 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, and 14.1.0-14.1.2.6, a BIG-IP virtual server with a Session Initiation Protocol (SIP) ALG profile, parsing SIP messages that contain a multi-part MIME payload with certain boundary strings can cause TMM to free memory to the wrong cache.. EPSS estimates a 1.04% chance of exploitation in the next 30 days.
Description
In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, and 14.1.0-14.1.2.6, a BIG-IP virtual server with a Session Initiation Protocol (SIP) ALG profile, parsing SIP messages that contain a multi-part MIME payload with certain boundary strings can cause TMM to free memory to the wrong cache.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Access Policy Manager | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Access Policy Manager | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Access Policy Manager | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Advanced Firewall Manager | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Advanced Firewall Manager | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Advanced Firewall Manager | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Analytics | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Analytics | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Analytics | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Application Acceleration Manager | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Application Acceleration Manager | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Application Acceleration Manager | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Application Security Manager | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Application Security Manager | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Application Security Manager | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Domain Name System | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Domain Name System | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Domain Name System | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Fraud Protection Service | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Fraud Protection Service | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Fraud Protection Service | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Global Traffic Manager | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Global Traffic Manager | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Global Traffic Manager | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Link Controller | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Link Controller | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Link Controller | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Local Traffic Manager | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Local Traffic Manager | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Local Traffic Manager | >= 15.1.0, < 15.1.0.5 |
| F5 | Big-Ip Policy Enforcement Manager | >= 14.1.0, < 14.1.2.7 |
| F5 | Big-Ip Policy Enforcement Manager | >= 15.0.0, < 15.0.1.4 |
| F5 | Big-Ip Policy Enforcement Manager | >= 15.1.0, < 15.1.0.5 |
References
- https://support.f5.com/csp/article/K42830212Vendor Advisory
- https://support.f5.com/csp/article/K42830212Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-5926?
In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, and 14.1.0-14.1.2.6, a BIG-IP virtual server with a Session Initiation Protocol (SIP) ALG profile, parsing SIP messages that contain a multi-part MIME payload with certain boundary strings can cause TMM to free memory to the wrong cache.
How severe is CVE-2020-5926?
CVE-2020-5926 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5926?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2020
- CVE-2020-5920In versions 15.0.0-15.1.0.5, 14.1.0-14.1.2.7, 13.1.0-13.1.3.…4.3
- CVE-2020-5921in BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-…7.5
- CVE-2020-5922In BIG-IP versions 15.0.0-15.1.0.4, 14.1.0-14.1.2.6, 13.1.0-…8.8
- CVE-2020-5923In BIG-IP versions 15.0.0-15.1.0.4, 14.1.0-14.1.2.6, 13.1.0-…5.4
- CVE-2020-5924In BIG-IP APM versions 12.1.0-12.1.5.1 and 11.6.1-11.6.5.2, …5.3
- CVE-2020-5925In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-…7.5
- CVE-2020-5927In versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, and 14.1.0-14.…6.1
- CVE-2020-5928In versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.…3.1
- CVE-2020-5929In versions 13.0.0-13.0.0 HF2, 12.1.0-12.1.2 HF1, and 11.6.1…5.9
- CVE-2020-5930In BIG-IP 15.0.0-15.1.0.4, 14.1.0-14.1.2.7, 13.1.0-13.1.3.3,…7.5
- CVE-2020-5931On BIG-IP 15.1.0-15.1.0.5, 14.1.0-14.1.2.3, 13.1.0-13.1.3.4,…7.5
- CVE-2020-5932On BIG-IP ASM 15.1.0-15.1.0.5, a cross-site scripting (XSS) …4.8
Are you affected by CVE-2020-5926?
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