What’s Vulnerable › Vulnerabilities

CVE-2018-20592

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-30 · updated 2026-06-17
• Weakness: CWE-416

Description

In Mini-XML (aka mxml) v2.12, there is a use-after-free in the mxmlAdd function of the mxml-node.c file. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted xml file, as demonstrated by mxmldoc.

Affected products

• Fedoraproject Fedora: 28, 29
• Msweet Mini-Xml: 2.12

References

• https://github.com/michaelrsweet/mxml/issues/237
• https://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/uaf_mxml-node.c:128_1.txt.err
• https://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/uaf_mxml-node.c:128_2.txt.err
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N53IJHDYR5HVQLKH4J6B27OEQLGKSGY5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNWF6BAU7S42O4LE4B74KIMHFE2HDNMI/
• https://github.com/michaelrsweet/mxml/issues/237
• https://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/uaf_mxml-node.c:128_1.txt.err
• https://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/uaf_mxml-node.c:128_2.txt.err
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N53IJHDYR5HVQLKH4J6B27OEQLGKSGY5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNWF6BAU7S42O4LE4B74KIMHFE2HDNMI/

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