| Name | CVE-2014-3660 |
| Description | parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the "billion laughs" attack. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
| References | DLA-151-1, DLA-80-1, DSA-2978-2, DSA-3057-1 |
| Debian Bugs | 765722 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libxml2 (PTS) | buster | 2.9.4+dfsg1-7+deb10u4 | fixed |
| buster (security) | 2.9.4+dfsg1-7+deb10u5 | fixed | |
| bullseye (security), bullseye | 2.9.10+dfsg-6.7+deb11u3 | fixed | |
| bookworm, sid | 2.9.14+dfsg-1.1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libxml2 | source | squeeze | 2.7.8.dfsg-2+squeeze11 | DLA-151-1 | ||
| libxml2 | source | wheezy | 2.8.0+dfsg1-7+wheezy3 | DSA-2978-2 | ||
| libxml2 | source | jessie | 2.9.1+dfsg1-5 | |||
| libxml2 | source | (unstable) | 2.9.2+dfsg1-1 | 765722 |
https://www.ncsc.nl/actueel/nieuwsberichten/kwetsbaarheid-ontdekt-in-libxml2.html
https://git.gnome.org/browse/libxml2/commit/?id=be2a7edaf289c5da74a4f9ed3a0b6c733e775230
Beware the upstream patch relies on other commits not
available in the squeeze/wheezy version (at least cff2546f that
changes how the ent->checked variable is used and likely a3f1e3e5 too)