GNU Libtasn1 up to 4.18.x asn1_encode_simple_der out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in GNU Libtasn1 up to 4.18.x. This issue affects the function asn1_encode_simple_der. Such manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2021-46848. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in GNU Libtasn1 up to 4.18.x and classified as problematic. Affected by this issue is the function asn1_encode_simple_der. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. CVE summarizes:

GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that affects asn1_encode_simple_der.

The weakness was presented 10/24/2022 as 32. The advisory is available at gitlab.com. This vulnerability is handled as CVE-2021-46848 since 10/24/2022. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 211211 (Fedora 37 : mingw-libtasn1 (2022-19056934a7)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.0 eliminates this vulnerability. Applying the patch 44a700d2051a666235748970c2df047ff207aeb5 is able to eliminate this problem. The bugfix is ready for download at gitlab.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (211211). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

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

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 211211
Nessus Name: Fedora 37 : mingw-libtasn1 (2022-19056934a7)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libtasn1 4.19.0
Patch: 44a700d2051a666235748970c2df047ff207aeb5

Timelineinfo

10/24/2022 🔍
10/24/2022 +0 days 🔍
10/24/2022 +0 days 🔍
05/07/2025 +926 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: 32
Status: Confirmed

CVE: CVE-2021-46848 (🔍)
GCVE (CVE): GCVE-0-2021-46848
GCVE (VulDB): GCVE-100-212018

Entryinfo

Created: 10/24/2022 19:49
Updated: 05/07/2025 18:04
Changes: 10/24/2022 19:49 (52), 11/16/2024 17:52 (16), 05/07/2025 18:04 (1)
Complete: 🔍
Cache ID: 216:64F:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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