The SIP channel driver (chan_sip) in Asterisk before 1.2.18 and 1.4.x before 1.4.3 does not properly parse SIP UDP packets that do not…

Description

The SIP channel driver (chan_sip) in Asterisk before 1.2.18 and 1.4.x before 1.4.3 does not properly parse SIP UDP packets that do not contain a valid response code, which allows remote attackers to cause a denial of service (crash).

Scores

EPSS (exploitation in 30 days)

2.4% · top 16% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (10)

• http://www.asterisk.org/files/ASA-2007-011.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://bugs.digium.com/view.php?id=9313 (opens in a new tab)x_refsource_MISCx_transferred
• SUSE-SA:2007:034 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 1017954 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 24359 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• 20070425 ASA-2007-011: Multiple problems in SIP channel parser handling response codes (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 25582 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• asterisk-sip-response-dos(33892) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• 2644 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
• DSA-1358 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Record last updated 7 Aug 2024, 13:33 UTC.