PT-2021-7863 · Ezxml+4 · Ezxml+4

Rc0R · Published 2021-04-15 · Updated 2022-05-16 · CVE-2021-31229

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions ezXML version 0.8.6

Description The issue is related to the ezxml internal dtd() function in the ezXML library, which performs incorrect memory handling while parsing crafted XML files. This leads to an out-of-bounds write of a one byte constant, allowing a remote attacker to cause a denial of service using a specially crafted XML file.

Recommendations For ezXML version 0.8.6, consider disabling the ezxml internal dtd() function as a temporary workaround until a patch is available. Restrict the use of crafted XML files to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2023-03829

CVE-2021-31229

DLA-2705-1

MGASA-2021-0580

OPENSUSE-SU-2021:1505-1

OPENSUSE-SU-2021:3804-1

OPENSUSE-SU-2021:3805-1

OPENSUSE-SU-2021:3815-1

OPENSUSE-SU-2021:3873-1

OPENSUSE-SU-2021_1505-1

OPENSUSE-SU-2021_3804-1

OPENSUSE-SU-2021_3805-1

OPENSUSE-SU-2021_3815-1

OPENSUSE-SU-2021_3873-1

SUSE-SU-2021:3804-1

SUSE-SU-2021:3805-1

SUSE-SU-2021:3815-1

SUSE-SU-2021:3873-1

USN-5061-1

Affected Products

Astra Linux

Debian

Suse

Ubuntu

Ezxml

References · 60

• 🔥 https://sourceforge.net/p/ezxml/bugs/26 · Exploit
• https://osv.dev/vulnerability/openSUSE-SU-2021:3815-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-31229 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-31229 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-30485 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-31229 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:1505-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:3805-1 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0580.html · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:3815-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0580 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31598 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31347 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:3873-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31229 · Security Note