CVE-2021-26717
Summary
| CVE | CVE-2021-26717 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-02-18 20:15:00 UTC |
| Updated | 2021-02-24 17:34:00 UTC |
| Description | An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash. |
Risk And Classification
Problem Types: NVD-CWE-noinfo
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Digium | Asterisk | All | All | All | All |
| Application | Digium | Asterisk | All | All | All | All |
| Application | Digium | Certified Asterisk | 16.8 | - | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc1 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc2 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc3 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc4 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert2 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert3 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc1 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc2 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc3 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc4 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert5 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | - | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc1 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc2 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc3 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert1-rc4 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert2 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert3 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc1 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc2 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc3 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert4-rc4 | All | All |
| Application | Digium | Certified Asterisk | 16.8 | cert5 | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| [ASTERISK-29203] res_pjsip_t38: Crash when changing state - Digium/Asterisk JIRA | CONFIRM | issues.asterisk.org | Issue Tracking, Patch, Vendor Advisory |
| Full Disclosure: AST-2021-002: Remote crash possible when negotiating T.38 | FULLDISC | seclists.org | Mailing List, Patch, Third Party Advisory |
| AST-2021-002 | CONFIRM | downloads.asterisk.org | Vendor Advisory |
| Index of /pub/security | MISC | downloads.asterisk.org | Vendor Advisory |
| Asterisk Project Security Advisory - AST-2021-002 ≈ Packet Storm | MISC | packetstormsecurity.com | Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 179641 Debian Security Update for asterisk (CVE-2021-26717)
- 500035 Alpine Linux Security Update for asterisk
- 501378 Alpine Linux Security Update for asterisk
- 503868 Alpine Linux Security Update for asterisk
- 690405 Free Berkeley Software Distribution (FreeBSD) Security Update for asterisk (e3894955-7227-11eb-8386-001999f8d30b)