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NVD / CVE Program· CNA mitre

CVE-2012-5976: Multiple stack consumption vulnerabilities in Asterisk Open Source 1.8.x before 1.8.19.1, 10.x before 10.11.1, and 11.x before 11.1.2…

MediumCVSS 5.0 · v2.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3% (FIRST EPSS); higher than 87.7% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: asterisk (Debian:14) 1:1.8.13.1~dfsg-2; asterisk (Debian:6.0) 1:1.6.2.9-2+squeeze9.

Low priority for now. Upgrade to asterisk (Debian:14) 1:1.8.13.1~dfsg-2; asterisk (Debian:6.0) 1:1.6.2.9-2+squeeze9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Multiple stack consumption vulnerabilities in Asterisk Open Source 1.8.x before 1.8.19.1, 10.x before 10.11.1, and 11.x before 11.1.2; Certified Asterisk 1.8.11 before 1.8.11-cert10; and Asterisk Digiumphones 10.x-digiumphones before 10.11.1-digiumphones allow remote attackers to cause a denial of service (daemon crash) via TCP data using the (1) SIP, (2) HTTP, or (3) XMPP protocol.

Published
Jan 4, 2013
Updated
Jun 16, 2026
EPSS
3.0% · 87th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.0%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2012-5976

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
digiumasterisk
digiumcertified asterisk

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • digium asteriskup to 1.8.19.0 inclusive
  • digium asterisk1.8.0
  • digium asterisk1.8.1
  • digium asterisk1.8.1.1
  • digium asterisk1.8.1.2
  • digium asterisk1.8.10.0
  • digium asterisk1.8.10.1
  • digium asterisk1.8.11.0
+12 more rows
  • digium asterisk1.8.11.1
  • digium asterisk1.8.12
  • digium asterisk1.8.12.0
  • digium asterisk1.8.13.0
  • digium asterisk1.8.13.1
  • digium asterisk1.8.14.0
  • digium asterisk1.8.14.1
  • digium asterisk1.8.15.0
  • digium asterisk1.8.15.1
  • digium asterisk1.8.16.0
  • digium asterisk1.8.17.0
  • digium asterisk1.8.18.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:14asteriskbefore 1:1.8.13.1~dfsg-21:1.8.13.1~dfsg-2
Debian:6.0asteriskbefore 1:1.6.2.9-2+squeeze91:1.6.2.9-2+squeeze9

Same product

digium: all records

Other highest-scoring records for the same primary product.

  • CVE-2006-5444Integer overflow in the get_input function in the Skinny channel driver (chan_skinny.c) in Asterisk 1.0.x before 1.0.12 and 1.2.x before…
    56Plan
  • CVE-2017-17850An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older.
    53Plan
  • CVE-2019-18610An issue was discovered in manager.c in Sangoma Asterisk through 13.x, 16.x, 17.x and Certified Asterisk 13.21 through 13.21-cert4.
    50Plan

Published before and after this one in the same product

  • ← EarlierCVE-2012-1183Sep 18, 2012 · Stack-based buffer overflow in the milliwatt_generate function in the Miliwatt application in Asterisk 1.4.x before 1.4.44, 1.6.x before…
    18Monitor
  • ← EarlierCVE-2012-1184Sep 18, 2012 · Stack-based buffer overflow in the ast_parse_digest function in main/utils.c in Asterisk 1.8.x before 1.8.10.1 and 10.x before 10.2.1…
    35Monitor
  • Later →CVE-2012-5977Jan 4, 2013 · Asterisk Open Source 1.8.x before 1.8.19.1, 10.x before 10.11.1, and 11.x before 11.1.2; Certified Asterisk 1.8.11 before 1.8.11-cert10…
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:asterisk1:1.8.13.1~dfsg-2 · Debian:14Package 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

AV:N/AC:L/Au:N/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.

ATT&CK techniques

—

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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