CVE-2017-18258
libxml2 - security update
6.5
MEDIUM
CVSS 3.1
EPSS 0.90%
Description
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.
How to fix CVE-2017-18258
To remediate CVE-2017-18258, upgrade the affected package to a fixed version below.
- —upgrade to 2.9.10+dfsg-2 or later
- —upgrade to 2.9.1+dfsg1-5+deb8u7 or later
- —upgrade to 2.9.4+dfsg1-2.2+deb9u3 or later
- —upgrade to 1.8.2 or later
Is CVE-2017-18258 being exploited?
Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 2.9.10+dfsg-2
- from 0, < 2.9.1+dfsg1-5+deb8u7
- from 0, < 2.9.4+dfsg1-2.2+deb9u3
- from 0, < 1.8.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |