Out-of-bounds read in libxml2



Published: 2020-09-15
Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE ID CVE-2020-24977
CWE ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Libxml2
Universal components / Libraries / Libraries used by multiple products

Vendor Gnome Development Team

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Out-of-bounds read

Risk: Medium

CVSSv3: 4.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:W/RC:C] [PCI]

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

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Note, the vulnerability was fixed in a commit 8e7c20a1 (20910-GITv2.9.10-103-g8e7c20a1).

Vulnerable software versions

Libxml2: 2.9.10

CPE External links

http://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.