CVE-2023-37457
By doing so this can overwrite memory or cause a crash.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- EPSS
- 1.13% probability · 64th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- digium/asterisk · sangoma/certified asterisk
- Source
- security-advisories@github.com
References
- https://github.com/asterisk/asterisk/commit/a1ca0268254374b515fa5992f01340f7717113faPatch
- https://github.com/asterisk/asterisk/security/advisories/GHSA-98rc-4j27-74hhVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
- https://github.com/asterisk/asterisk/commit/a1ca0268254374b515fa5992f01340f7717113faPatch
- https://github.com/asterisk/asterisk/security/advisories/GHSA-98rc-4j27-74hhVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.