Description
The parse_chunk_header function in libtorrent before 1.1.1 allows remote attackers to cause a denial of service (crash) via a crafted (1) HTTP response or possibly a (2) UPnP broadcast.
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 | libtorrent-rasterbar | 1.1.0-1 | — |
| Debian 13 | libtorrent-rasterbar | 1.1.0-1 | — |
| Debian 12 | libtorrent-rasterbar | 1.1.0-1 | — |
| Debian 7 | libtorrent-rasterbar | 0.15.10-1+deb7u1 | DLA-511-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | libtorrent-rasterbar | 1.0.7-1ubuntu0.1~esm1 | USN-4790-1 |
| Ubuntu Pro 14.04 LTS | libtorrent-rasterbar | 0.16.13-1ubuntu2.1+esm1 | USN-4790-1 |
Advisories 2
- USN-4790-1 libtorrent vulnerability Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-511-1 libtorrent-rasterbar - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20160604 Re: Libtorrent http_parser.cpp denial of service mailing-list
- openSUSE-SU-2016:1683 vendor-advisory
- 91498 vdb-entry
- [oss-security] 20160604 Libtorrent http_parser.cpp denial of service mailing-list
- https://github.com/arvidn/libtorrent/pull/782/files
- https://github.com/arvidn/libtorrent/issues/780
- openSUSE-SU-2016:2283 vendor-advisory
- openSUSE-SU-2016:1635 vendor-advisory