asterisk: SIP valid account enumeration flaw
Published Sep 4, 2008
3.5
LOWCVSS 2.0
EPSS 1.85%
Description
Asterisk Open Source 1.2.x before 1.2.32, 1.4.x before 1.4.24.1, and 1.6.0.x before 1.6.0.8; Asterisk Business Edition A.x.x, B.x.x before B.2.5.8, C.1.x.x before C.1.10.5, and C.2.x.x before C.2.3.3; s800i 1.3.x before 1.3.0.2; and Trixbox PBX 2.6.1, when Digest authentication and authalwaysreject are enabled, generates different responses depending on whether a SIP username is valid, which allows remote attackers to enumerate valid usernames.
Affected products
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:M/Au:S/C:P/I:N/A:N
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.85% (0.01852) | 78.36th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.85% (0.01852) | 76.30th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.50% (0.00502) | 63.96th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.66% (0.00662) | 80.35th | v3 (v2023.03.01) |
| Mar 29, 2024 | 0.60% (0.00600) | 78.03th | v3 (v2023.03.01) |
| Oct 25, 2023 | 0.60% (0.00600) | 76.03th | v3 (v2023.03.01) |
| Sep 18, 2023 | 0.50% (0.00503) | 73.59th | v3 (v2023.03.01) |
| Aug 12, 2023 | 0.47% (0.00467) | 72.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.60% (0.00600) | 75.14th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.24% (0.03236) | 84.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.24% (0.03236) | 82.63th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.24% (0.03236) | 65.31th | v2 (v2022.01.01) |
References (13)
- http://downloads.asterisk.org/pub/security/AST-2009-003.html x_refsource_CONFIRM
- http://misel.com/?p=52 x_refsource_MISC
- http://secunia.com/advisories/34982 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/37677 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-200905-01.xml vendor-advisoryx_refsource_GENTOO
- http://www.debian.org/security/2009/dsa-1952 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/34353 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2009/0933 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2008-3903 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=461271 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45059 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2008-3903
- https://www.cve.org/CVERecord?id=CVE-2008-3903
| Link | Providers | Tags |
|---|---|---|
| http://downloads.asterisk.org/pub/security/AST-2009-003.html | x_refsource_CONFIRM | |
| http://misel.com/?p=52 | x_refsource_MISC | |
| http://secunia.com/advisories/34982 | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/37677 | third-party-advisoryx_refsource_SECUNIA | |
| http://security.gentoo.org/glsa/glsa-200905-01.xml | vendor-advisoryx_refsource_GENTOO | |
| http://www.debian.org/security/2009/dsa-1952 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/34353 | vdb-entryx_refsource_BID | |
| http://www.vupen.com/english/advisories/2009/0933 | vdb-entryx_refsource_VUPEN | |
| https://access.redhat.com/security/cve/CVE-2008-3903 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=461271 | Issue Tracking | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/45059 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2008-3903 | ||
| https://www.cve.org/CVERecord?id=CVE-2008-3903 |
Change history (0)
No recorded changes yet.