7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
43.4%
OpenSIPS is a Session Initiation Protocol (SIP) server implementation.
Prior to versions 3.1.7 and 3.2.4, OpenSIPS crashes when a malformed SDP
body is received and is processed by the delete_sdp_line
function in the
sipmsgops module. This issue can be reproduced by calling the function with
an SDP body that does not terminate by a line feed (i.e. \n
). The
vulnerability was found while performing black-box fuzzing against an
OpenSIPS server running a configuration that made use of the functions
codec_delete_except_re
and codec_delete_re
. The same issue was also
discovered while performing coverage guided fuzzing on the function
codec_delete_except_re
. The crash happens because the function
delete_sdp_line
expects that an SDP line is terminated by a line feed
(\n
): By abusing this vulnerability, an attacker is able to crash the
server. It affects configurations containing functions that rely on the
affected code, such as the function codec_delete_except_re
. Due to the
sanity check that is performed in the del_lump
function, exploitation of
this issue will generate an abort
in the lumps processing function,
resulting in a Denial of Service. This issue has been fixed in versions
3.1.7 and 3.2.4.
github.com/OpenSIPS/opensips/commit/8f87c7c03da55f9c79bd92e67fa2c94b2a7ce5cf
github.com/OpenSIPS/opensips/security/advisories/GHSA-xj5x-g52f-548h
launchpad.net/bugs/cve/CVE-2023-27601
nvd.nist.gov/vuln/detail/CVE-2023-27601
opensips.org/docs/modules/3.3.x/sipmsgops.html
opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf
security-tracker.debian.org/tracker/CVE-2023-27601
www.cve.org/CVERecord?id=CVE-2023-27601
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
43.4%