high7.5
CVE-2023-37457
Asterisk is an open source private branch exchange and telephony toolkit.
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Digium | Asterisk | through 18.20.0 from 19.0.0 through 20.5.0 Version 21.0.0 |
| Sangoma | Certified Asterisk | Versions 13.13.0, 16.8.0, 18.9 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/asterisk/asterisk/commit/a1ca0268254374b515fa5992f01340f7717113fa
- https://github.com/asterisk/asterisk/security/advisories/GHSA-98rc-4j27-74hh
- https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
- https://github.com/asterisk/asterisk/commit/a1ca0268254374b515fa5992f01340f7717113fa
- https://github.com/asterisk/asterisk/security/advisories/GHSA-98rc-4j27-74hh
- https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html