vulnwire
7.5high

CVE-2017-9233

XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinit…

Published 9 y ago · modified 29 d ago · JSON

CVSS
7.5
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
8.7%
percentile 95%
Public exploits
0
none known

XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.

CISA SSVC assessment

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
29 d ago

Exploit prediction (EPSS)

8.74% probability of exploitation in the next 30 days, higher than 95% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.17.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference
  • CWE-835 Loop with Unreachable Exit Condition

References

  • support.apple.com /HT208144 · x_refsource_CONFIRM, x_transferred
  • libexpat.github.io /doc/cve-2017-9233/ · x_refsource_CONFIRM, x_transferred
  • github.com /libexpat/libexpat/blob/master/expat/Changes · x_refsource_CONFIRM, x_transferred
  • securitytracker.com /id/1039427 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • support.apple.com /HT208113 · x_refsource_CONFIRM, x_transferred
  • support.apple.com /HT208112 · x_refsource_CONFIRM, x_transferred
  • support.apple.com /HT208115 · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-3898 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • securityfocus.com /bid/99276 · vdb-entry, x_refsource_BID, x_transferred
  • openwall.com /lists/oss-security/2017/06/17/7 · mailing-list, x_refsource_MLIST, x_transferred
  • support.f5.com /csp/article/K03244804 · x_refsource_CONFIRM, x_transferred
  • lists.apache.org /thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkee · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkee · mailing-list, x_refsource_MLIST, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.