Fedora EPEL 7 update for tor

1) Out-of-bounds read

EUVDB-ID: #VU31154

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-8955

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

Exploit availability: No

Description

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

The vulnerability exists due to an out-of-bounds read that occurs via memory exhaustion in the KIST cell scheduler.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 7

tor: before 0.3.5.8-1.el7

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:7:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:tor:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-f8311ec8a2

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.