chan_skinny.c in the Skinny (aka SCCP) channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x b
chan_skinny.c in the Skinny (aka SCCP) channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x before 1.8.12.1 and 10.x before 10.4.1 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by closing a connection in off-hook mode.
- Published
- Jun 2, 2012
- Updated
- Jun 16, 2026
- EPSS
- 2.1% · 81th percentile
- CWE
- CWE-399
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Report tools
Action score
17
Monitor
Low priority for now.
- CVSS
- 16 / 40 · 4.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| asterisk | certified asterisk | cpe:2.3:a:asterisk:certified_asterisk |
| asterisk | open source | cpe:2.3:a:asterisk:open_source |
| sangoma | asterisk | cpe:2.3:a:sangoma:asterisk |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- asterisk certified asterisk1.8.11
- asterisk open source1.8.0
- asterisk open source1.8.1
- asterisk open source1.8.10.0
- asterisk open source1.8.11.0
- asterisk open source1.8.12
- asterisk open source1.8.12.0
- asterisk open source1.8.2
- asterisk open source1.8.3
- asterisk open source1.8.5
- asterisk open source1.8.5.0
- asterisk open source1.8.6.0
- asterisk open source1.8.7.0
- asterisk open source1.8.8.0
- asterisk open source1.8.9.0
- asterisk open source10.0.0
- asterisk open source10.1.0
- asterisk open source10.2.0
- asterisk open source10.3
- asterisk open source10.3.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:14 | asterisk | before 1:1.8.13.0~dfsg-1 | 1:1.8.13.0~dfsg-1 |
| Debian:6.0 | asterisk | before 1:1.6.2.9-2+squeeze6 | 1:1.6.2.9-2+squeeze6 |
Same product
asterisk: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-9358A memory exhaustion vulnerability exists in Asterisk Open Source 13.x before 13.15.1 and 14.x before 14.4.1 and Certified Asterisk 13.13 bef31Monitor
- CVE-2021-46837res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7,27Monitor
- CVE-2020-28242An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Cer26Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:asterisk | 1:1.8.13.0~dfsg-1 · Debian:14 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-399 · Resource Management ErrorsCVSS vector
AV:N/AC:L/Au:S/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- archives.neohapsis.com/archives/bugtraq/2012-05/0145.html
- downloads.asterisk.org/pub/security/AST-2012-008.html
- secunia.com/advisories/49303
- www.debian.org/security/2012/dsa-2493
- www.securityfocus.com/bid/53723
- www.securitytracker.com/id?1027103
- exchange.xforce.ibmcloud.com/vulnerabilities/75937
Vendor advisories and official records. Exploit/PoC links are deliberately left out.