CVE-2018-16657
9.8
CRITICAL · CVSS 3.0 · EPSS 3.6% (pctl 89)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with an invalid Via header causes a segmentation fault and crashes Kamailio. The reason is missing input validation in the crcitt_string_array core function for calculating a CRC hash for To tags. (An additional error is present in the check_via_address core function: this function also misses input validation.) This could result in denial of service and potentially the execution of arbitrary code.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.58% — more likely to be exploited than 89% of all CVEs |
| Weakness | CWE-476 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-09-07 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| debian | debian linux |
| kamailio | kamailio |
References
- https://lists.debian.org/debian-lts-announce/2018/09/msg00013.html
- https://skalatan.de/blog/advisory-hw-2018-06
- https://www.debian.org/security/2018/dsa-4292
- https://lists.debian.org/debian-lts-announce/2018/09/msg00013.html
- https://skalatan.de/blog/advisory-hw-2018-06
- https://www.debian.org/security/2018/dsa-4292
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