VDB
CVE-2021-26906
CVE-2021-26906
PUBLISHED
Reported by mitre · Published February 18, 2021
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| asterisk | Alpine | 18.2.1-r0, 16.16.1-r0 |
| asterisk | digium | 18.2.1, 17.9.2, 16.16.1, 13.38.2 |
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| alpine | asterisk | 0, 0 |
| n/a | n/a | * |
Timeline
- Feb 18, 2021 CVE Published
- Apr 14, 2021 EPSS Score (30 in total, the first dated here)
- Aug 3, 2024 CVE Updated
- Mar 26, 2026 Security Advisory (2 in total, the first dated here)
- Aug 7, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2021-26906
vulnetix vdb fixes CVE-2021-26906Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2021-26906/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
References
- x_refsource_MISC
- 20210218 AST-2021-005: Remote Crash Vulnerability in PJSIP channel driver mailing-listx_refsource_FULLDISC
- x_refsource_CONFIRM
- x_refsource_CONFIRM
- x_refsource_MISC