Vulnerability · Published Jun 23, 2023 · Assigned by mitre
CVE-2023-34188
High 7.5
In plain English
A high-severity security flaw in the swupdate package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.0%top 36.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The HTTP server in Mongoose before 7.10 accepts requests containing negative Content-Length headers. By sending a single attack payload over TCP, an attacker can cause an infinite loop in which the server continuously reparses that payload, and does not respond to any other requests.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | swupdate | no fix listed | DEBIAN-CVE-2023-34188 |
| Debian:13 | swupdate | 2024.12+dfsg-1 | DEBIAN-CVE-2023-34188 |
| Debian:14 | swupdate | 2024.12+dfsg-1 | DEBIAN-CVE-2023-34188 |
| Ubuntu:26.10 | mongoose | no fix listed | UBUNTU-CVE-2023-34188 |
| Ubuntu:22.04:LTS | swupdate | no fix listed | UBUNTU-CVE-2023-34188 |
| Ubuntu:24.04:LTS | swupdate | no fix listed | UBUNTU-CVE-2023-34188 |
Affected products (as reported)
Weakness: CWE-1284
References
- https://github.com/cesanta/mongoose/commit/4663090a8fb036146dfe77718cff612b0101cb0f
- https://github.com/cesanta/mongoose/pull/2197
- https://github.com/cesanta/mongoose/compare/7.9...7.10
- https://blog.narfindustries.com/blog/narf-discovers-critical-vulnerabilities-in-cesanta-mongoose-http-server
- https://security.netapp.com/advisory/ntap-20250228-0001/