MEDIUM
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet
Published Jul 6, 2011
5.0
MEDIUMCVSS 2.0
EPSS 4.28%
Description
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
Affected products
No data.
Configuration 1
OR
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0
- 1.6.0.1
- 1.6.0.2
- 1.6.0.3
- 1.6.0.3
- 1.6.0.4
- 1.6.0.5
- 1.6.0.6
- 1.6.0.7
- 1.6.0.8
- 1.6.0.9
- 1.6.0.10
- 1.6.0.11
- 1.6.0.11
- 1.6.0.11
- 1.6.0.12
- 1.6.0.13
- 1.6.0.14
- 1.6.0.14
- 1.6.0.15
- 1.6.0.16
- 1.6.0.16
- 1.6.0.16
- 1.6.0.17
- 1.6.0.18
- 1.6.0.18
- 1.6.0.18
- 1.6.0.18
- 1.6.0.19
- 1.6.0.20
- 1.6.0.21
- 1.6.0.21
- 1.6.0.22
- 1.6.0.23
- 1.6.0.24
- 1.6.0.25
- 1.6.0.26
- 1.6.1
- 1.6.1
- 1.6.1
- 1.6.1
- 1.6.1
- 1.6.1
- 1.6.1.0
- 1.6.1.0
- 1.6.1.0
- 1.6.1.0
- 1.6.1.0
- 1.6.1.1
- 1.6.1.2
- 1.6.1.3
- 1.6.1.4
- 1.6.1.5
- 1.6.1.5
- 1.6.1.6
- 1.6.1.7
- 1.6.1.7
- 1.6.1.8
- 1.6.1.9
- 1.6.1.10
- 1.6.1.10
- 1.6.1.10
- 1.6.1.10
- 1.6.1.11
- 1.6.1.12
- 1.6.1.12
- 1.6.1.13
- 1.6.1.13
- 1.6.1.14
- 1.6.1.15
- 1.6.1.16
- 1.6.1.17
- 1.6.1.18
- 1.6.1.18
- 1.6.1.18
- 1.6.1.19
- 1.6.1.19
- 1.6.1.19
- 1.6.1.19
- 1.6.1.20
- 1.6.1.20
- 1.6.1.20
- 1.6.1.21
- 1.6.1.22
- 1.6.1.23
- 1.6.1.24
- 1.6.2.0
- 1.6.2.0
- 1.6.2.0
- 1.6.2.0
- 1.6.2.0
- 1.6.2.0
- 1.6.2.0
- 1.6.2.0
- 1.6.2.1
- 1.6.2.1
- 1.6.2.2
- 1.6.2.3
- 1.6.2.4
- 1.6.2.5
- 1.6.2.6
- 1.6.2.6
- 1.6.2.6
- 1.6.2.15
- 1.6.2.16
- 1.6.2.16
- 1.6.2.16.1
- 1.6.2.16.2
- 1.6.2.17
- 1.6.2.17
- 1.6.2.17
- 1.6.2.17
- 1.6.2.17.1
- 1.6.2.17.2
- 1.6.2.17.3
- 1.6.2.18
- 1.6.2.18
Configuration 2
OR
- 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.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.28% 0.04276
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.04276
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.28% (0.04276) | 90.79th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.28% (0.04276) | 89.79th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.36% (0.03361) | 86.20th | v4 (v2025.03.14) |
| Mar 29, 2025 | 20.90% (0.20900) | 92.86th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.36% (0.03361) | 86.51th | v4 (v2025.03.14) |
| Dec 17, 2024 | 26.92% (0.26925) | 96.77th | v3 (v2023.03.01) |
| Mar 7, 2023 | 6.57% (0.06574) | 92.62th | 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://downloads.asterisk.org/pub/security/AST-2011-008.diff x_refsource_CONFIRMPatch
- http://downloads.asterisk.org/pub/security/AST-2011-008.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://securitytracker.com/id?1025706 vdb-entryx_refsource_SECTRACK
- http://www.debian.org/security/2011/dsa-2276 vendor-advisoryx_refsource_DEBIAN
- http://www.osvdb.org/73307 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/48431 vdb-entryx_refsource_BID
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68203 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://downloads.asterisk.org/pub/security/AST-2011-008.diff | x_refsource_CONFIRMPatch | |
| http://downloads.asterisk.org/pub/security/AST-2011-008.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://securitytracker.com/id?1025706 | vdb-entryx_refsource_SECTRACK | |
| http://www.debian.org/security/2011/dsa-2276 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.osvdb.org/73307 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/bid/48431 | vdb-entryx_refsource_BID | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/68203 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 6, 2011
Updated Aug 6, 2024
Reserved Jun 16, 2011
Link CVE-2011-2529
CISA Vulnrichment
Updated n/a