CVE-2023-37457
8.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
46.8%
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the ‘update’ functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the ‘update’ functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.
Affected configurations
CNA Affected
[
{
"vendor": "asterisk",
"product": "asterisk",
"versions": [
{
"version": "<= 18.20.0",
"status": "affected"
},
{
"version": ">= 19.0.0, <= 20.5.0",
"status": "affected"
},
{
"version": "= 21.0.0",
"status": "affected"
},
{
"version": " <= 18.9-cert5",
"status": "affected"
}
]
}
]Related
8.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
46.8%