The SIP channel driver in Asterisk Open Source 1.8.x before 1.8.20.2, 10.x before 10.12.2, and 11.x before 11.2.2; Certified Asterisk 1.8.15 before 1.8.15-cert2; Asterisk Business Edition (BE) C.3.x before C.3.8.1; and Asterisk Digiumphones 10.x-digiumphones before 10.12.2-digiumphones exhibits different behavior for invalid INVITE, SUBSCRIBE, and REGISTER transactions depending on whether the user account exists, which allows remote attackers to enumerate account names by (1) reading HTTP status codes, (2) reading additional text in a 403 (aka Forbidden) response, or (3) observing whether certain retransmissions occur.
Conclusion & alert: CVE-2013-2264 is rated Moderate Risk (44/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.25%). Core evidence: EPSS rose +1.08% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.17% | 1.25% | +1.08% |
| 2 | 2025-03-30 | 0.36% | 0.17% | -0.19% |
| 3 | 2025-03-29 | — | 0.36% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2013-2264 low priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2013-2264 |
gentoo
|
high | CVE-2013-2264: 1 GLSA(s) (201401-15), 1 atom(s) (net-misc/asterisk); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-2264 |
ubuntu
|
medium | CVE-2013-2264 medium priority: Ubuntu including 1 source packages (asterisk), 15 status rows across 15 suites (hardy, lucid, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 7, not-affected 6, DNE 1, released 1. | https://ubuntu.com/security/CVE-2013-2264 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:beta1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:beta2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:beta3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:beta4:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:beta5:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:rc4:*:*:*:*:*:* |
| asterisk | open_source | 1.8.0 | cpe:2.3:a:asterisk:open_source:1.8.0:rc5:*:*:*:*:*:* |
| asterisk | open_source | 1.8.1 | cpe:2.3:a:asterisk:open_source:1.8.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.1 | cpe:2.3:a:asterisk:open_source:1.8.1:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.1.1 | cpe:2.3:a:asterisk:open_source:1.8.1.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.1.2 | cpe:2.3:a:asterisk:open_source:1.8.1.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.2 | cpe:2.3:a:asterisk:open_source:1.8.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.2 | cpe:2.3:a:asterisk:open_source:1.8.2:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.2.1 | cpe:2.3:a:asterisk:open_source:1.8.2.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.2.2 | cpe:2.3:a:asterisk:open_source:1.8.2.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.2.3 | cpe:2.3:a:asterisk:open_source:1.8.2.3:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.2.4 | cpe:2.3:a:asterisk:open_source:1.8.2.4:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.3 | cpe:2.3:a:asterisk:open_source:1.8.3:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.3 | cpe:2.3:a:asterisk:open_source:1.8.3:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.3 | cpe:2.3:a:asterisk:open_source:1.8.3:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.3 | cpe:2.3:a:asterisk:open_source:1.8.3:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.3.1 | cpe:2.3:a:asterisk:open_source:1.8.3.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.3.2 | cpe:2.3:a:asterisk:open_source:1.8.3.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.3.3 | cpe:2.3:a:asterisk:open_source:1.8.3.3:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4 | cpe:2.3:a:asterisk:open_source:1.8.4:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4 | cpe:2.3:a:asterisk:open_source:1.8.4:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4 | cpe:2.3:a:asterisk:open_source:1.8.4:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4 | cpe:2.3:a:asterisk:open_source:1.8.4:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4.1 | cpe:2.3:a:asterisk:open_source:1.8.4.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4.2 | cpe:2.3:a:asterisk:open_source:1.8.4.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4.3 | cpe:2.3:a:asterisk:open_source:1.8.4.3:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.4.4 | cpe:2.3:a:asterisk:open_source:1.8.4.4:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.5 | cpe:2.3:a:asterisk:open_source:1.8.5:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.5.0 | cpe:2.3:a:asterisk:open_source:1.8.5.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.6.0 | cpe:2.3:a:asterisk:open_source:1.8.6.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.6.0 | cpe:2.3:a:asterisk:open_source:1.8.6.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.6.0 | cpe:2.3:a:asterisk:open_source:1.8.6.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.6.0 | cpe:2.3:a:asterisk:open_source:1.8.6.0:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.7.0 | cpe:2.3:a:asterisk:open_source:1.8.7.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.7.0 | cpe:2.3:a:asterisk:open_source:1.8.7.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.7.0 | cpe:2.3:a:asterisk:open_source:1.8.7.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.7.1 | cpe:2.3:a:asterisk:open_source:1.8.7.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.7.2 | cpe:2.3:a:asterisk:open_source:1.8.7.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.0 | cpe:2.3:a:asterisk:open_source:1.8.8.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.0 | cpe:2.3:a:asterisk:open_source:1.8.8.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.0 | cpe:2.3:a:asterisk:open_source:1.8.8.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.0 | cpe:2.3:a:asterisk:open_source:1.8.8.0:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.0 | cpe:2.3:a:asterisk:open_source:1.8.8.0:rc4:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.0 | cpe:2.3:a:asterisk:open_source:1.8.8.0:rc5:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.1 | cpe:2.3:a:asterisk:open_source:1.8.8.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.8.2 | cpe:2.3:a:asterisk:open_source:1.8.8.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.9.0 | cpe:2.3:a:asterisk:open_source:1.8.9.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.9.0 | cpe:2.3:a:asterisk:open_source:1.8.9.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.9.0 | cpe:2.3:a:asterisk:open_source:1.8.9.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.9.0 | cpe:2.3:a:asterisk:open_source:1.8.9.0:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.9.1 | cpe:2.3:a:asterisk:open_source:1.8.9.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.9.2 | cpe:2.3:a:asterisk:open_source:1.8.9.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.9.3 | cpe:2.3:a:asterisk:open_source:1.8.9.3:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.10.0 | cpe:2.3:a:asterisk:open_source:1.8.10.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.10.0 | cpe:2.3:a:asterisk:open_source:1.8.10.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.10.0 | cpe:2.3:a:asterisk:open_source:1.8.10.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.10.0 | cpe:2.3:a:asterisk:open_source:1.8.10.0:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.10.0 | cpe:2.3:a:asterisk:open_source:1.8.10.0:rc4:*:*:*:*:*:* |
| asterisk | open_source | 1.8.10.1 | cpe:2.3:a:asterisk:open_source:1.8.10.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.11.0 | cpe:2.3:a:asterisk:open_source:1.8.11.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.11.0 | cpe:2.3:a:asterisk:open_source:1.8.11.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.11.0 | cpe:2.3:a:asterisk:open_source:1.8.11.0:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.11.1 | cpe:2.3:a:asterisk:open_source:1.8.11.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.12 | cpe:2.3:a:asterisk:open_source:1.8.12:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.12.0 | cpe:2.3:a:asterisk:open_source:1.8.12.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.12.0 | cpe:2.3:a:asterisk:open_source:1.8.12.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.8.12.0 | cpe:2.3:a:asterisk:open_source:1.8.12.0:rc3:*:*:*:*:*:* |
| asterisk | open_source | 1.8.12.1 | cpe:2.3:a:asterisk:open_source:1.8.12.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.12.2 | cpe:2.3:a:asterisk:open_source:1.8.12.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.13.0 | cpe:2.3:a:asterisk:open_source:1.8.13.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.8.13.0 | cpe:2.3:a:asterisk:open_source:1.8.13.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.8.13.0 | cpe:2.3:a:asterisk:open_source:1.8.13.0:rc2:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://downloads.asterisk.org/pub/security/AST-2013-003.html | Vendor Advisory |
| https://issues.asterisk.org/jira/browse/ASTERISK-21013 | Vendor Advisory |