Vulnerability Name:

CVE-2017-12621

Assigned:2017-08-07
Published:2017-09-27
Updated:2017-10-10
Summary:During Jelly (xml) file parsing with Apache Xerces, if a custom doctype entity is declared with a "SYSTEM" entity with a URL and that entity is used in the body of the Jelly file, during parser instantiation the parser will attempt to connect to said URL. This could lead to XML External Entity (XXE) attacks in Apache Commons Jelly before 1.0.1.
CVSS v3 Severity:9.8 Critical (CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.3 High (CCN CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-611
References:Source: BID
Type: VENDOR_ADVISORY
101052

Source: SECTRACK
Type: VENDOR_ADVISORY
1039444

Source: CONFIRM
Type: VENDOR_ADVISORY
https://issues.apache.org/jira/browse/JELLY-293

Source: MLIST
Type: VENDOR_ADVISORY
https://lists.apache.org/thread.html/f1fc3f2c45264af44ce782d54b5908ac95f02bf7ad88bb57bfb04b73@%3Cdev.commons.apache.org%3E

Vulnerable Configuration:Configuration 1:
  • cpe:/a:apache:commons-jelly:1.0.1:rc6:*:*:*:*:*:*

  • Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.trusty:def:201712621000
    V
    CVE-2017-12621 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-09-27
    oval:com.ubuntu.xenial:def:201712621000
    V
    CVE-2017-12621 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-09-27
    BACK
    apache commons-jelly 1.0.1 rc6