PT-2019-6208 · Libxml2+1 · Libxml2+1

Kees Cook · Published 2019-11-13 · Updated 2019-11-20 · CVE-2010-4657

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions PHP versions prior to 5.4.4

Description The issue is related to the XMLWriter component in PHP, where a memory leak occurs due to the failure to release resources after their expiration. This can be exploited by a remote attacker to disclose protected information. Specifically, passing invalid UTF-8 strings via the xmlTextWriterWriteAttribute function can cause libxml2 to misparse them, resulting in a memory leak in the output.

Recommendations For versions prior to 5.4.4, update to version 5.4.4 or later to resolve the issue. As a temporary workaround, consider restricting the use of the xmlTextWriterWriteAttribute function to minimize the risk of exploitation.

Fix

Missing Release of Resource after Effective Lifetime

Weakness Enumeration

CWE-772

Related Identifiers

BDU:2022-02599

CVE-2010-4657

Affected Products

Php

Libxml2

References · 8

• https://security-tracker.debian.org/tracker/CVE-2010-4657 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02599 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2010-4657 · Security Note
• https://access.redhat.com/security/cve/cve-2010-4657 · Note
• https://t.me/cibsecurity/8221 · Telegram Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4657 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4657 · Note
• https://bugs.launchpad.net/php/%2Bbug/655442 · Note