Description
ConnMan (aka Connection Manager) 1.30 through 1.39 has a stack-based buffer overflow in uncompress in dnsproxy.c via NAME, RDATA, or RDLENGTH (for A or AAAA).
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 | connman | 1.36-2.2 | — |
| Debian 13 | connman | 1.36-2.2 | — |
| Debian 12 | connman | 1.36-2.2 | — |
| Debian 9 | connman | 1.33-3+deb9u3 | DLA-2915-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | connman | 1.36-2.3ubuntu0.1 | USN-6236-1 |
| Ubuntu 20.04 LTS | connman | 1.36-2ubuntu0.1 | USN-6236-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | connman | 1.35-6ubuntu0.1~esm1 | USN-6236-1 |
| Ubuntu Pro 16.04 LTS | connman | 1.21-1.2+deb8u1ubuntu0.1~esm1 | USN-6236-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | connman | 1.40-2.2 | openSUSE-SU-2024:10692-1 |
Advisories 3
- USN-6236-1 connman vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DLA-2915-1 connman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10692-1 connman-1.40-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://lore.kernel.org/connman/
- [oss-security] 20210609 connman stack buffer overflow in dnsproxy CVE-2021-33833 mailing-list
- GLSA-202107-29 vendor-advisory
- [oss-security] 20220125 Multiple vulnerabilities in connman's dnsproxy component mailing-list
- [debian-lts-announce] 20220209 [SECURITY] [DLA 2915-1] connman security update mailing-list