CVE-2021-32558
HIGH
7.5
CVSS Score
Published: July 27, 2021 at 05:19 AM UTC
Updated: June 17, 2026 at 03:53 AM UTC
3 products affected across 2 vendorsDebian LinuxAsteriskCertified Asterisk
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Severity
HIGH7.5
Exploit prediction
EPSS 9%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%13.0.0 ≤ v < 13.38.316.0.0 ≤ v < 16.19.117.0.0 ≤ v < 17.9.418.0.0 ≤ v < 18.15.1
Affected range stops below 13.38.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.19.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.9.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.15.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.html
- http://seclists.org/fulldisclosure/2021/Jul/49
- https://downloads.asterisk.org/pub/security/AST-2021-008.html
- https://issues.asterisk.org/jira/browse/ASTERISK-29392
- https://www.debian.org/security/2021/dsa-4999
References (6)
x_refsource_MISCPatchThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.htmlMailing Listx_refsource_FULLDISCPatchThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2021/Jul/49x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://downloads.asterisk.org/pub/security/AST-2021-008.htmlx_refsource_MISCExploitIssue TrackingPatchVendor Advisory
Source: [email protected]
https://issues.asterisk.org/jira/browse/ASTERISK-29392Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/08/msg00005.htmlVendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4999CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-74
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