Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2020-24659 |
CWE-ID | CWE-476 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
openEuler Operating systems & Components / Operating system gnutls-help Operating systems & Components / Operating system package or component gnutls-debuginfo Operating systems & Components / Operating system package or component gnutls-debugsource Operating systems & Components / Operating system package or component gnutls-devel Operating systems & Components / Operating system package or component gnutls Operating systems & Components / Operating system package or component |
Vendor | openEuler |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU46295
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-24659
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure. A remote attacker can perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS
gnutls-help: before 3.6.14-6
gnutls-debuginfo: before 3.6.14-6
gnutls-debugsource: before 3.6.14-6
gnutls-devel: before 3.6.14-6
gnutls: before 3.6.14-6
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1046
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.