CVE-2017-18258
Published: 8 April 2018
The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.
Notes
Author | Note |
---|---|
leosilva | precise/esm hasn't support for LZMA |
ccdm94 | the fix for this issue seems to introduce the vulnerability related to CVE-2018-9251. |
Priority
Status
Package | Release | Status |
---|---|---|
libxml2 Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
trusty |
Released
(2.9.1+dfsg1-3ubuntu4.13)
|
|
bionic |
Released
(2.9.4+dfsg1-6.1ubuntu1.2)
|
|
upstream |
Released
(2.9.6)
|
|
xenial |
Released
(2.9.3+dfsg1-1ubuntu0.6)
|
|
Patches: upstream: https://git.gnome.org/browse/libxml2/commit/?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |