CVE-2021-46837
Medium
Description
res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Certified Asterisk
PublishedAug 30, 2022
First seenAug 30, 2022
How to fix
Update
- digium asterisk16.16.2, 17.9.3, 18.2.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| asterisk certified_asterisk | 16.8.0 | — |
| digium asterisk | 16.0.0 ≤ v < 16.16.2, 17.0.0 ≤ v < 17.9.3, 18.0.0 ≤ v < 18.2.2 | 16.16.2, 17.9.3, 18.2.2 |
| debian debian_linux | 9.0, 10.0, 11.0 | — |
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