GNU Libtasn1 up to 4.12 asn1_check_identifier null pointer dereference

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6.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in GNU Libtasn1 up to 4.12. Affected is the function asn1_check_identifier. Performing a manipulation results in null pointer dereference. This vulnerability is identified as CVE-2017-10790. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in GNU Libtasn1 up to 4.12. This affects the function asn1_check_identifier. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

The _asn1_check_identifier function in GNU Libtasn1 through 4.12 causes a NULL pointer dereference and crash when reading crafted input that triggers assignment of a NULL value within an asn1_node structure. It may lead to a remote denial of service attack.

The bug was discovered 07/20/2017. The weakness was released 07/02/2017 by Amir (Website). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2017-10790 since 07/01/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 101937 (Debian DLA-1038-1 : libtasn1-3 security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171505 (SUSE Enterprise Linux Security Update for gnutls (SUSE-SU-2018:2842-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (101937) and SecurityFocus (BID 105138†). Entries connected to this vulnerability are available at VDB-123135, VDB-123136, VDB-123137 and VDB-132547. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 101937
Nessus Name: Debian DLA-1038-1 : libtasn1-3 security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 55734
OpenVAS Name: Debian LTS Advisory ([SECURITY] [DLA 1038-1] libtasn1-3 security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

07/01/2017 🔍
07/01/2017 +0 days 🔍
07/02/2017 +1 days 🔍
07/02/2017 +0 days 🔍
07/20/2017 +18 days 🔍
07/24/2017 +4 days 🔍
07/25/2017 +1 days 🔍
08/21/2018 +392 days 🔍
12/09/2022 +1571 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: USN-3547-1
Researcher: Eyal Ronen, Kenneth G. Paterson, Adi Shamir. (Amir)
Status: Confirmed

CVE: CVE-2017-10790 (🔍)
GCVE (CVE): GCVE-0-2017-10790
GCVE (VulDB): GCVE-100-102981

OVAL: 🔍

SecurityFocus: 105138 - GnuTLS Multiple Information Disclosure Vulnerabilities

See also: 🔍

Entryinfo

Created: 07/02/2017 11:57
Updated: 12/09/2022 15:00
Changes: 07/02/2017 11:57 (74), 10/21/2019 17:15 (6), 12/30/2020 12:49 (3), 12/09/2022 15:00 (3)
Complete: 🔍
Cache ID: 216::103

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