CVE-2021-32558 : An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.

An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x before 18.5.1, and Certified Asterisk before 16.8-cert10. If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.

Published 2021-07-30 14:15:17

Updated 2021-11-28 23:16:19

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-32558

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 11.0
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Matching versions
Digium » Asterisk
Versions from including (>=) 16.0.0 and before (<) 16.19.1
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
Matching versions
Digium » Asterisk
Versions from including (>=) 13.0.0 and before (<) 13.38.3
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
Matching versions
Digium » Asterisk
Versions from including (>=) 17.0.0 and before (<) 17.9.4
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
Matching versions
Digium » Asterisk
Versions from including (>=) 18.0.0 and before (<) 18.15.1
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8
cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert1-rc1
cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert1-rc2
cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert1-rc3
cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert1-rc4
cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert2
cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert3
cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert4
cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert4-rc1
cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert4-rc2
cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc2:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert4-rc3
cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc3:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert4-rc4
cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc4:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert5
cpe:2.3:a:digium:certified_asterisk:16.8:cert5:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert7
cpe:2.3:a:digium:certified_asterisk:16.8:cert7:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert8
cpe:2.3:a:digium:certified_asterisk:16.8:cert8:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert9
cpe:2.3:a:digium:certified_asterisk:16.8:cert9:*:*:*:*:*:*
Matching versions
Digium » Certified Asterisk » Version: 16.8 Update Cert6
cpe:2.3:a:digium:certified_asterisk:16.8:cert6:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2021-32558

Top countries where our scanners detected CVE-2021-32558

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-32558 45,168

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-32558!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-32558

EPSS FAQ

1.21%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 78 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-32558

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-32558

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-32558

https://lists.debian.org/debian-lts-announce/2021/08/msg00005.html

[SECURITY] [DLA 2729-1] asterisk security update
Mailing List;Third Party Advisory
http://seclists.org/fulldisclosure/2021/Jul/49

Full Disclosure: AST-2021-008: Remote crash when using IAX2 channel driver
Mailing List;Patch;Third Party Advisory
https://www.debian.org/security/2021/dsa-4999

Debian -- Security Information -- DSA-4999-1 asterisk
Third Party Advisory

CVEs referencing this url
https://issues.asterisk.org/jira/browse/ASTERISK-29392

[ASTERISK-29392] chan_iax2: Asterisk crashes when queueing video with format - Digium/Asterisk JIRA
Exploit;Issue Tracking;Patch;Vendor Advisory
https://downloads.asterisk.org/pub/security/AST-2021-008.html

AST-2021-008
Patch;Vendor Advisory
http://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.html

Asterisk Project Security Advisory - AST-2021-008 ≈ Packet Storm
Patch;Third Party Advisory;VDB Entry