Vulnerability in Linphone Belle-Sip
CVE-2021-33056
Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (69.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/BelledonneCommunications/belle-sip/commit/116e3eb48fe43ea63eb9f3c4b4… (Patch, Third Party Advisory)
- github.com/BelledonneCommunications/belle-sip/compare/4.5.15...4.5.20 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33056?
- CVE-2021-33056 is a high-severity vulnerability in Linphone Belle-Sip, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2021-08-12.
- How severe is CVE-2021-33056?
- High severity. CVSS v3 base score is 7.5 out of 10.