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CVE-2020-27507

Date: March 14, 2023

The Kamailio SIP before 5.5.0 server mishandles INVITE requests with duplicated fields and overlength tag, leading to a buffer overflow that crashes the server or possibly have unspecified other impact.

Language: C

Severity Score

Related Resources (7)

https://people.canonical.com/~ubuntu-security/cve/CVE-2020-27507
https://lists.debian.org/debian-lts-announce/2023/05/msg00030.html
https://security-tracker.debian.org/tracker/CVE-2020-27507
https://nvd.nist.gov/vuln/detail/CVE-2020-27507
https://github.com/kamailio/kamailio/issues/2503
https://github.com/kamailio/kamailio/commit/ada3701d22b1fd579f06b4f54fa695fa988e685f
https://www.mend.io/vulnerability-database/CVE-2020-27507

Severity Score

Weakness Type (CWE)

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CWE-120

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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