CVE-2016-4008

Publication date 14 April 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.8, when used without the ASN1_DECODE_FLAG_STRICT_DER flag, allows remote attackers to cause a denial of service (infinite recursion) via a crafted certificate.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libtasn1-3	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Fixed 2.10-1ubuntu1.5
libtasn1-6	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Fixed 4.7-3ubuntu0.16.04.1
	15.10 wily	Fixed 4.5-2ubuntu0.1
	14.04 LTS trusty	Fixed 3.4-3ubuntu0.4
	12.04 LTS precise	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libtasn1-6	Upstream: http://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=commit;h=f435825c0f527a8e52e6ffbc3ad0bc60531d537e Upstream: http://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=commit;h=a6e0a0b58f5cdaf4e9beca5bce69c09808cbb625

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE-2016-4008

Cvss 3 Severity Score

Description

Status

Patch details

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references