reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP packet with a Contact header that lacks a < (less than) character
Published Jul 6, 2011
5.0
MEDIUMCVSS 2.0
EPSS 3.97%
Description
reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP packet with a Contact header that lacks a < (less than) character.
Affected products
No data.
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.0
- 1.8.1
- 1.8.1
- 1.8.1.1
- 1.8.1.2
- 1.8.2
- 1.8.2.1
- 1.8.2.2
- 1.8.2.3
- 1.8.2.4
- 1.8.3
- 1.8.3
- 1.8.3
- 1.8.3
- 1.8.3.1
- 1.8.3.2
- 1.8.3.3
- 1.8.4
- 1.8.4
- 1.8.4
- 1.8.4
- 1.8.4.1
- 1.8.4.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.97% (0.03972) | 90.15th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.97% (0.03972) | 89.09th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.31% (0.02315) | 83.33th | v4 (v2025.03.14) |
| Mar 29, 2025 | 11.48% (0.11481) | 89.30th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.31% (0.02315) | 83.65th | v4 (v2025.03.14) |
| Dec 12, 2024 | 7.52% (0.07524) | 94.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.52% (0.07524) | 93.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
No CWE recorded.
References (7)
- http://downloads.asterisk.org/pub/security/AST-2011-009-1.8.diff x_refsource_CONFIRMPatch
- http://downloads.asterisk.org/pub/security/AST-2011-009.html x_refsource_CONFIRMVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html vendor-advisoryx_refsource_FEDORA
- http://secunia.com/advisories/45048 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/45201 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/45239 third-party-advisoryx_refsource_SECUNIA
- http://www.debian.org/security/2011/dsa-2276 vendor-advisoryx_refsource_DEBIAN
| Link | Providers | Tags |
|---|---|---|
| http://downloads.asterisk.org/pub/security/AST-2011-009-1.8.diff | x_refsource_CONFIRMPatch | |
| http://downloads.asterisk.org/pub/security/AST-2011-009.html | x_refsource_CONFIRMVendor Advisory | |
| http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html | vendor-advisoryx_refsource_FEDORA | |
| http://secunia.com/advisories/45048 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://secunia.com/advisories/45201 | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/45239 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.debian.org/security/2011/dsa-2276 | vendor-advisoryx_refsource_DEBIAN |
Change history (0)
No recorded changes yet.