CVE-2024-42491
A malformed Contact or Record-Route URI in an incoming SIP request can cause Asterisk to crash when res_resolver_unbound is used
Severity Score
5.7
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track
*SSVC
Descriptions
Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To receive a patch, users should upgrade to one of the following versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk configurations.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2024-08-02 CVE Reserved
- 2024-09-05 CVE Published
- 2024-09-05 CVE Updated
- 2024-09-06 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-252: Unchecked Return Value
- CWE-476: NULL Pointer Dereference
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4 | X_refsource_misc | |
| https://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742 | X_refsource_misc | |
| https://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2 | X_refsource_misc | |
| https://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8 | X_refsource_misc | |
| https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0 | X_refsource_misc | |
| https://github.com/asterisk/asterisk/security/advisories/GHSA-v428-g3cw-7hv9 | X_refsource_confirm |
| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Asterisk Search vendor "Asterisk" | Asterisk Search vendor "Asterisk" for product "Asterisk" | < 18.24.3 Search vendor "Asterisk" for product "Asterisk" and version " < 18.24.3" | en |
Affected
| ||||||
| Asterisk Search vendor "Asterisk" | Asterisk Search vendor "Asterisk" for product "Asterisk" | >= 19.0.0 < 20.9.3 Search vendor "Asterisk" for product "Asterisk" and version " >= 19.0.0 < 20.9.3" | en |
Affected
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| Asterisk Search vendor "Asterisk" | Asterisk Search vendor "Asterisk" for product "Asterisk" | >= 21.0.0 < 21.4.3 Search vendor "Asterisk" for product "Asterisk" and version " >= 21.0.0 < 21.4.3" | en |
Affected
| ||||||
| Asterisk Search vendor "Asterisk" | Asterisk Search vendor "Asterisk" for product "Asterisk" | < 18.9 Search vendor "Asterisk" for product "Asterisk" and version " < 18.9" | en |
Affected
| ||||||
| Asterisk Search vendor "Asterisk" | Asterisk Search vendor "Asterisk" for product "Asterisk" | >= 19.0 < 20.7 Search vendor "Asterisk" for product "Asterisk" and version " >= 19.0 < 20.7" | en |
Affected
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