Description
A stack-based buffer over-read exists in setbit() at iptree.h of TCPFLOW 1.5.0, due to received incorrect values causing incorrect computation, leading to denial of service during an address_histogram call or a get_histogram call.
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 | tcpflow | 1.5.2+repack1-1 | — |
| Debian 13 | tcpflow | 1.5.2+repack1-1 | — |
| Debian 12 | tcpflow | 1.5.2+repack1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | tcpflow | 1.4.5+repack1-4ubuntu0.18.04.1 | USN-3955-1 |
| Ubuntu 16.04 LTS | tcpflow | 1.4.5+repack1-1ubuntu0.1 | USN-3955-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | tcpflow | 1.4.4+repack1-2ubuntu0.1~esm1 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.23 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.22 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.21 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.20 | tcpflow | 1.5.0-r1 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.18 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.17 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.16 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.15 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.14 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.13 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.12 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.11 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.10 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.9 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.8 | tcpflow | 1.5.0-r1 | — |
| Alpine v3.7 | tcpflow | 1.5.0-r1 | — |
Advisories 1
- USN-3955-1 tcpflow vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- https://github.com/simsong/tcpflow/issues/195
- FEDORA-2019-8cdd669aca vendor-advisory
- FEDORA-2019-2c020ccbd5 vendor-advisory
- USN-3955-1 vendor-advisory