Out-of-bounds read in libxml2



| Updated: 2021-05-14
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-24977
CWE-ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Libxml2
Universal components / Libraries / Libraries used by multiple products

Vendor Gnome Development Team

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated 14.05.2021

Added fixed version.

1) Out-of-bounds read

EUVDB-ID: #VU46737

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-24977

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the xmlEncodeEntitiesInternal() function in libxml2/entities.c in libxml2. A remote attacker can pas specially crafted XML data to the affected application, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Libxml2: 2.9.10

CPE2.3 External links

https://lists.opensuse.org/opensuse-security-announce/2020-09/msg00036.html
https://gitlab.gnome.org/GNOME/libxml2/-/issues/178
https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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