Null pointer dereference in libtASN1 - CVE-2017-10790

Vulnerability identifier: #VU10322

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-10790

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the _asn1_check_identifier function in GNU Libtasn1 due to insufficient validation of user-supplied input. A remote attacker can submit a specially crafted input, trigger assignment of a NULL value within an asn1_node structure and cause the service to crash.

libtASN1
Debian Linux
Gentoo Linux
Ubuntu
Opensuse
libtasn1 (Alpine package)

Update to version 4.12 or later.

libtasn1 (Alpine package) - update to 4.7-r3

• https://security.gentoo.org/glsa/201710-11

• Ubuntu update for Libtasn1
• Debian update for libtasn1-6
• Gentoo update for GNU Libtasn1
• OpenSUSE Linux update for gnutls
• OpenSUSE Linux update for gnutls
• Null pointer dereference in libtasn1 (Alpine package)