Gentoo update for Tor



Published: 2023-05-04
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-38385
CVE-2022-33903
CVE-2023-23589
CWE-ID CWE-617
CWE-399
CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Gentoo Linux
Operating systems & Components / Operating system

net-vpn/tor
Operating systems & Components / Operating system package or component

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Reachable Assertion

EUVDB-ID: #VU56095

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38385

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion caused by a behavior mismatch between our batch-signature verification code and our single-signature verification code. A remote attacker can trigger assertion failure and perform a denial of service attack.

Mitigation

Update the affected packages.
net-vpn/tor to version: 0.4.7.13

Vulnerable software versions

Gentoo Linux: All versions

net-vpn/tor: before 0.4.7.13

CPE2.3 External links

http://security.gentoo.org/glsa/202305-11


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) Resource management error

EUVDB-ID: #VU75732

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-33903

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources when processing wedging of RTT estimation. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages.
net-vpn/tor to version: 0.4.7.13

Vulnerable software versions

Gentoo Linux: All versions

net-vpn/tor: before 0.4.7.13

CPE2.3 External links

http://security.gentoo.org/glsa/202305-11


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.

3) Information disclosure

EUVDB-ID: #VU71194

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23589

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a logical error within the process_socks4_request() function in src/core/proto/proto_socks.c, which leaks DNS queries in case the "SafeSocks=1". A remote attacker can gain unauthorized access to sensitive information.

Mitigation

Update the affected packages.
net-vpn/tor to version: 0.4.7.13

Vulnerable software versions

Gentoo Linux: All versions

net-vpn/tor: before 0.4.7.13

CPE2.3 External links

http://security.gentoo.org/glsa/202305-11


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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