Description
A vulnerability was found in obgm libcoap 4.3.4. It has been rated as critical. Affected by this issue is the function get_split_entry of the file src/coap_oscore.c of the component Configuration File Handler. The manipulation leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue. VDB-252206 is the identifier assigned to this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| obgm | libcoap | 4.3.4 | — |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libcoap3 | 4.3.5-1 | — |
| Debian 13 | libcoap3 | 4.3.4-1.1+deb13u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libcoap3 | No fix yet | — |
| Ubuntu 25.10 | libcoap3 | No fix yet | — |
| Ubuntu 24.04 LTS | libcoap3 | No fix yet | — |
References
- https://vuldb.com/?id.252206 vdb-entry technical-description
- https://vuldb.com/?ctiid.252206 signature permissions-required
- https://github.com/obgm/libcoap/issues/1310 issue-tracking
- https://github.com/obgm/libcoap/issues/1310#issue-2099860835 exploit issue-tracking
- https://github.com/obgm/libcoap/pull/1311 issue-tracking patch