Resource exhaustion in Digium Asterisk
CVE-2009-2726
The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C.2.x before C.2.4.1, and C.3.x before C.3.1; and Asterisk Appliance s800i 1.2.x before 1.3.0.3 does not use a maximum width when invoking sscanf style functions, which allows remote attackers to cause a denial of service (stack memory consumption) via SIP packets containing large sequences of ASCII decimal characters, as demonstrated via vectors related to (1) the CSeq value in a SIP header, (2) large Content-Length value, and (3) SDP.
EPSS: 0.065 (93.1th percentile) — read the EPSS interpretation.
Affected products
- Digium Asterisk
- Digium S800i
- Digium S800i_firmware
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_MISC, Broken Link)
- cve@mitre.org (vdb-entry, Broken Link, x_refsource_VUPEN, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Product)
- cve@mitre.org (Exploit, VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
- cve@mitre.org (mailing-list, x_refsource_BUGTRAQ, VDB Entry, Third Party Advisory, Broken Link)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK, Broken Link)
- cve@mitre.org (x_refsource_SECUNIA, Broken Link, Vendor Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2009-2726?
- CVE-2009-2726 is a vulnerability in Digium Asterisk, classified under Allocation of Resources Without Limits or Throttling. Published 2009-08-12.
- Is CVE-2009-2726 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.