HIGH
The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0.6.0, when configured to allow unauthenticated calls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of calls that do not complete a 3-way handshake, which causes an ast_channel to be allocated but not released
Published Jul 31, 2007
7.5
HIGHCVSS 3.1
EPSS 5.94%
Description
The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0.6.0, when configured to allow unauthenticated calls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of calls that do not complete a 3-way handshake, which causes an ast_channel to be allocated but not released.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
7.8 HIGH NVD
AV:N/AC:L/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
5.94% 0.05943
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.05943
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.94% (0.05943) | 93.04th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.94% (0.05943) | 92.31th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.33% (0.03328) | 86.13th | v4 (v2025.03.14) |
| Mar 29, 2025 | 14.26% (0.14256) | 90.67th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.04% (0.03036) | 85.75th | v4 (v2025.03.14) |
| Dec 17, 2024 | 28.80% (0.28801) | 96.86th | v3 (v2023.03.01) |
| Sep 25, 2024 | 24.14% (0.24144) | 96.69th | v3 (v2023.03.01) |
| Jul 11, 2024 | 26.34% (0.26342) | 96.78th | v3 (v2023.03.01) |
| Jun 3, 2024 | 32.52% (0.32525) | 97.03th | v3 (v2023.03.01) |
| Apr 26, 2024 | 33.40% (0.33398) | 97.00th | v3 (v2023.03.01) |
| Mar 19, 2024 | 34.70% (0.34695) | 96.99th | v3 (v2023.03.01) |
| Feb 9, 2024 | 33.93% (0.33934) | 96.92th | v3 (v2023.03.01) |
| Jan 2, 2024 | 13.78% (0.13781) | 95.12th | v3 (v2023.03.01) |
| Aug 6, 2023 | 11.21% (0.11205) | 94.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 10.46% (0.10460) | 94.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
Weaknesses (1)
References (11)
- http://bugs.gentoo.org/show_bug.cgi?id=185713 x_refsource_CONFIRMIssue TrackingPatch
- http://ftp.digium.com/pub/asa/ASA-2007-018.pdf x_refsource_CONFIRMBroken LinkPatch
- http://osvdb.org/38197 vdb-entryx_refsource_OSVDBBroken Link
- http://secunia.com/advisories/26274 third-party-advisoryx_refsource_SECUNIABroken LinkPatchVendor Advisory
- http://secunia.com/advisories/29051 third-party-advisoryx_refsource_SECUNIABroken Link
- http://security.gentoo.org/glsa/glsa-200802-11.xml vendor-advisoryx_refsource_GENTOOThird Party Advisory
- http://securityreason.com/securityalert/2960 third-party-advisoryx_refsource_SREASONBroken Link
- http://www.securityfocus.com/archive/1/475069/100/0/threaded mailing-listx_refsource_BUGTRAQBroken LinkThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/24950 vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id?1018472 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- http://www.vupen.com/english/advisories/2007/2701 vdb-entryx_refsource_VUPENBroken Link
| Link | Providers | Tags |
|---|---|---|
| http://bugs.gentoo.org/show_bug.cgi?id=185713 | x_refsource_CONFIRMIssue TrackingPatch | |
| http://ftp.digium.com/pub/asa/ASA-2007-018.pdf | x_refsource_CONFIRMBroken LinkPatch | |
| http://osvdb.org/38197 | vdb-entryx_refsource_OSVDBBroken Link | |
| http://secunia.com/advisories/26274 | third-party-advisoryx_refsource_SECUNIABroken LinkPatchVendor Advisory | |
| http://secunia.com/advisories/29051 | third-party-advisoryx_refsource_SECUNIABroken Link | |
| http://security.gentoo.org/glsa/glsa-200802-11.xml | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| http://securityreason.com/securityalert/2960 | third-party-advisoryx_refsource_SREASONBroken Link | |
| http://www.securityfocus.com/archive/1/475069/100/0/threaded | mailing-listx_refsource_BUGTRAQBroken LinkThird Party AdvisoryVDB Entry | |
| http://www.securityfocus.com/bid/24950 | vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id?1018472 | vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry | |
| http://www.vupen.com/english/advisories/2007/2701 | vdb-entryx_refsource_VUPENBroken Link |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 31, 2007
Updated Aug 7, 2024
Reserved Jul 30, 2007
Link CVE-2007-4103
CISA Vulnrichment
Updated n/a