Multiple vulnerabilities in GnuTLS
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2019-3829 CVE-2019-3836 |
| CWE-ID | CWE-415 CWE-119 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
GnuTLS Universal components / Libraries / Libraries used by multiple products |
| Vendor | GnuTLS |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Double free
EUVDB-ID: #VU18107
Risk: High
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-3829
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a double free error in the certificate verification API when processing X.509 crtificates. A remote attacker can supply a specially crafted X.509 certificate, trigger double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsGnuTLS: 3.5.8 - 3.6.6
External linkshttp://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3829
http://gitlab.com/gnutls/gnutls/issues/694
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7TJIBRJWGWSH6XIO2MXIQ3W6ES4R6I4/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRSOL66LHP4SD3Y2ECJDOGT4K663ECDU/
http://www.gnutls.org/security-new.html#GNUTLS-SA-2019-03-27
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) Buffer overflow
EUVDB-ID: #VU18106
Risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-3836
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform denial of service attack.
The vulnerability exists due to uninitialized pointer access when processing TLS1.3 asynchronous messages. A remote attacker can pass specially crafted asynchronous post-handshake message, trigger memory corruption and perform denial of service attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsGnuTLS: 3.6.4 - 3.6.6
External linkshttp://www.gnutls.org/security-new.html#GNUTLS-SA-2019-03-27
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3836
http://gitlab.com/gnutls/gnutls/issues/704
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.
