PT-2017-3261 · Xmlsoft+3 · Libxml2+3

Published 2017-05-15 · Updated 2021-06-29 · CVE-2017-9050

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions libxml2 version 20904-GITv2.9.4-16-g0741801

Description The issue is caused by a heap-based buffer over-read in the xmlDictAddString function in dict.c. This can lead to a crash in programs that use libxml2, such as PHP. The vulnerability exists due to an incomplete fix for a previous issue. It may allow a remote attacker to cause a denial of service.

Recommendations For libxml2 version 20904-GITv2.9.4-16-g0741801, consider disabling the xmlDictAddString function as a temporary workaround until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Buffer Overflow

Weakness Enumeration

CWE-125

CWE-119

Related Identifiers

ALT-PU-2019-1924

ALT-PU-2019-3079

BDU:2018-00017

CVE-2017-9050

DLA-1008-1

DSA-3952-1

GHSA-8C56-CPMW-89X7

MGASA-2018-0048

SUSE-SU-2017:1454-1

SUSE-SU-2017:1538-1

SUSE-SU-2017:1557-1

SUSE-SU-2017:1587-1

SUSE-SU-2017:2699-1

SUSE-SU-2017:2700-1

USN-3424-1

USN-3424-2

Affected Products

Alt Linux

Suse

Ubuntu

Libxml2

References · 103

• 🔥 http://openwall.com/lists/oss-security/2017/05/15/1 · Exploit
• https://bdu.fstec.ru/vul/2021-05256 · Security Note
• https://ubuntu.com/security/notices/USN-3424-1 · Vendor Advisory
• https://security.gentoo.org/glsa/201711-01 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-00235 · Security Note
• https://bdu.fstec.ru/vul/2019-00734 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19956 · Security Note
• https://ubuntu.com/security/CVE-2017-9047 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-04730 · Security Note
• https://ubuntu.com/security/CVE-2017-9050 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0663 · Security Note
• https://ubuntu.com/security/CVE-2017-0663 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-9050 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9048 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2017-9050 · Vendor Advisory