Description
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. FreeSWITCH prior to version 1.10.7 is susceptible to Denial of Service via SIP flooding. When flooding FreeSWITCH with SIP messages, it was observed that after a number of seconds the process was killed by the operating system due to memory exhaustion. By abusing this vulnerability, an attacker is able to crash any FreeSWITCH instance by flooding it with SIP messages, leading to Denial of Service. The attack does not require authentication and can be carried out over UDP, TCP or TLS. This issue was patched in version 1.10.7.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| signalwire | freeswitch | < 1.10.7 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.23 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.22 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.21 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.20 | freeswitch | 1.10.7-r0 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.18 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.17 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.16 | freeswitch | 1.10.7-r0 | — |
| Alpine v3.15 | freeswitch | 1.10.7-r0 | — |