Fedora 33 update for libldb, samba

Published: 2020-04-30 | Updated: 2025-04-25

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-10700 CVE-2020-10704
CWE-ID	CWE-416 CWE-121
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software	Fedora Operating systems & Components / Operating system samba Operating systems & Components / Operating system package or component libldb Operating systems & Components / Operating system package or component
Vendor	Fedoraproject

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU27376

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-10700

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a use-after-free error when Paged results control is combined with ASQ control while performing search operations. A remote authenticated user can send a specially crafted LDAP search query, trigger a use-after-free error and perform a denial of service attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 33

samba: before 4.12.2-0.fc33.1

libldb: before 2.1.2-1.fc33

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-0e7cd09521

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

2) Stack-based buffer overflow

EUVDB-ID: #VU27377