CVE-2023-37457
asterisk - security update
Description
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.
How to fix CVE-2023-37457
To remediate CVE-2023-37457, upgrade the affected package to a fixed version below.
- —upgrade to 18.20.2-r0 or later
- —upgrade to 1:16.28.0~dfsg-0+deb11u4 or later
- —upgrade to 1:16.28.0~dfsg-0+deb10u4 or later
- —upgrade to 1:16.28.0~dfsg-0+deb11u4 or later
Is CVE-2023-37457 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 18.20.2-r0
- from 0, < 1:16.28.0~dfsg-0+deb11u4
- from 0, < 1:16.28.0~dfsg-0+deb10u4
- from 0, < 1:16.28.0~dfsg-0+deb11u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |