#VU22821 Use-after-free in libcomps - CVE-2019-3817

Vulnerability identifier: #VU22821

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-3817

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libcomps
Universal components / Libraries / Libraries used by multiple products

Vendor: rpm-software-management

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when merging two ObjMRTrees while processing XML files in libcomps. A remote attacker can create a specially crafted XML file, pass it to the application, trigger a use-after-free error and crash the application or execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libcomps: 0.1.2 - 0.1.9

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3817
https://github.com/rpm-software-management/libcomps/commit/e3a5d056633677959ad924a51758876d415e7046
https://github.com/rpm-software-management/libcomps/issues/41

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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.