PT-2021-7862 · Ezxml+4 · Ezxml+4

Rc0R · Published 2021-04-01 · Updated 2022-05-16 · CVE-2021-30485

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 An issue in the ezXML library for parsing XML documents is related to pointer dereference errors. The function ezxml internal dtd() performs incorrect memory handling while parsing a crafted XML file, leading to a NULL pointer dereference. This can be exploited by a remote attacker to cause a denial of service using a specially crafted XML file.

Recommendations For ezXML version 0.8.6, as a temporary workaround, consider disabling the ezxml internal dtd() function until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2023-03828

CVE-2021-30485

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 · 62

• 🔥 https://sourceforge.net/p/ezxml/bugs/25 · Exploit
• https://osv.dev/vulnerability/openSUSE-SU-2021:3815-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-03828 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-30485 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-30485 · 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://cve.org/CVERecord?id=CVE-2021-30485 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-30485 · Security Note
• 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