CVE-2021-26906
Medium
Description
An issue was discovered in res_pjsip_session.c in Digium Asterisk through 13.38.1; 14.x, 15.x, and 16.x through 16.16.0; 17.x through 17.9.1; and 18.x through 18.2.0, and Certified Asterisk through 16.8-cert5. An SDP negotiation vulnerability in PJSIP allows a remote server to potentially crash Asterisk by sending specific SIP responses that cause an SDP negotiation failure.
SeverityMedium
CVSS5.9
Exploit probability—
ProductDigium Asterisk
PublishedFeb 18, 2021
First seenFeb 18, 2021
How to fix
Update
- digium asterisk13.38.2, 16.16.1, 17.9.2, 18.2.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| digium asterisk | 13.0.0 ≤ v < 13.38.2, 16.0.0 ≤ v < 16.16.1, 17.0.0 ≤ v < 17.9.2, 18.0 ≤ v < 18.2.1 | 13.38.2, 16.16.1, 17.9.2, 18.2.1 |
| digium certified_asterisk | 16.8 | — |
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