Resource exhaustion in Xmlsoft Libxml2
CVE-2017-18258
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.
EPSS: 0.027 (84.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Xmlsoft Libxml2
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (mailing-list, x_refsource_MLIST)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory)
- cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM)
- cve@mitre.org (x_refsource_CONFIRM)
- cve@mitre.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2017-18258?
- CVE-2017-18258 is a medium-severity vulnerability in Xmlsoft Libxml2, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2018-04-08.
- How severe is CVE-2017-18258?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2017-18258 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.