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
Install update from vendor's website.
Vulnerable software versions
libxml2 (Alpine package)
Alpine Linux 2.52.9.1-r1, 2.9.1-r0
Alpine Linux 3.122.9.10-r4
CPE
External links
https://git.alpinelinux.org/aports/commit/?id=d84e627ac3eb58c9324b16dff512000f8c980ce0
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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