CVE-2021-26906
CVSS V2 Medium 4.3
CVSS V3 Medium 5.9
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.
Overview
- CVE ID
- CVE-2021-26906
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-02-18T20:15:12
- Last Modified Date
- 2021-02-24T17:03:15
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* | 1 | OR | 13.0.0 | 13.38.2 |
| cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* | 1 | OR | 16.0.0 | 16.16.1 |
| cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* | 1 | OR | 17.0.0 | 17.9.2 |
| cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* | 1 | OR | 18.0 | 18.2.1 |
| cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert5:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 5.9
- Base Severity
- MEDIUM
- Exploitability Score
- 2.2
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://issues.asterisk.org/jira/browse/ASTERISK-29196 | Issue Tracking Patch Vendor Advisory |
| https://downloads.asterisk.org/pub/security/ | Vendor Advisory |
| https://downloads.asterisk.org/pub/security/AST-2021-005.html | Vendor Advisory |
| http://seclists.org/fulldisclosure/2021/Feb/61 | Mailing List Patch Third Party Advisory |
| http://packetstormsecurity.com/files/161477/Asterisk-Project-Security-Advisory-AST-2021-005.html | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-26906 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26906 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:21:55 | Added to TrackCVE | |||
| 2022-12-05 22:23:20 | 2021-02-18T20:15Z | 2021-02-18T20:15:12 | CVE Published Date | updated |
| 2022-12-05 22:23:20 | 2021-02-24T17:03:15 | CVE Modified Date | updated | |
| 2022-12-05 22:23:20 | Analyzed | Vulnerability Status | updated |