Fedora 34 update for golang



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-27919
CVE-2021-36221
CWE-ID CWE-20
CWE-362
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

golang
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU51485

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-2021-27919

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in the Reader.Open API when use a ZIP archive containing files start with “../”. A remote attacker can trick a victim to open a specially crafted ZIP archive and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 34

golang: before 1.16.8-1.fc34

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-6a3024b3fd


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.

2) Race condition

EUVDB-ID: #VU55668

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-36221

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition in net/http/httputil ReverseProxy when handling ErrAbortHandler events. A remote attacker can trigger a race condition and crash the ReverseProxy.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 34

golang: before 1.16.8-1.fc34

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-6a3024b3fd


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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