openEuler 20.03 LTS SP1 update for c-ares



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2023-31130
CVE-2023-31147
CWE-ID CWE-124
CWE-338
Exploitation vector Network
Public exploit N/A
Vulnerable software
 openEuler
Operating systems & Components / Operating system

c-ares-help
Operating systems & Components / Operating system package or component

c-ares-devel
Operating systems & Components / Operating system package or component

c-ares-debuginfo
Operating systems & Components / Operating system package or component

c-ares-debugsource
Operating systems & Components / Operating system package or component

c-ares
Operating systems & Components / Operating system package or component

Vendor openEuler

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer Underwrite ('Buffer Underflow')

EUVDB-ID: #VU76425

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-31130

CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a buffer underflow when using certain IPv6 addresses, such as 0::00:00:00/2". A local privileged user can trigger a boundary error and crash the service.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

c-ares-help: before 1.16.1-7

c-ares-devel: before 1.16.1-7

c-ares-debuginfo: before 1.16.1-7

c-ares-debugsource: before 1.16.1-7

c-ares: before 1.16.1-7

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1357


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

EUVDB-ID: #VU76426

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-31147

CWE-ID: CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to usage of a rand() function in case /dev/urandom or RtlGenRandom() are unavailable. A remote attacker can perform spoofing attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

c-ares-help: before 1.16.1-7

c-ares-devel: before 1.16.1-7

c-ares-debuginfo: before 1.16.1-7

c-ares-debugsource: before 1.16.1-7

c-ares: before 1.16.1-7

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1357


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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