RSA Package for Python up to 3.2 Signature verify input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in RSA Package for Python up to 3.2. This impacts the function verify of the component Signature Handler. The manipulation results in input validation. This vulnerability is reported as CVE-2016-1494. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in RSA Package for Python up to 3.2 (Programming Language Software). It has been classified as critical. Affected is the function verify of the component Signature Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, and integrity. CVE summarizes:

The verify function in the RSA package for Python (Python-RSA) before 3.3 allows attackers to spoof signatures with a small public exponent via crafted signature padding, aka a BERserk attack.

The weakness was disclosed 01/13/2016 (Website). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2016-1494 since 01/04/2016. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 88585 (FreeBSD : py-rsa -- Bleichenbacher'06 signature forgery vulnerability (e78bfc9d-cb1e-11e5-b251-0050562a4d7b)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350058 (Amazon Linux Security Advisory for python-rsa: ALAS-2016-644).

Upgrading to version 3.3 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 (88585) and SecurityFocus (BID 79829†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

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

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 88585
Nessus Name: FreeBSD : py-rsa -- Bleichenbacher'06 signature forgery vulnerability (e78bfc9d-cb1e-11e5-b251-0050562a4d7b)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-644
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: RSA Package for Python 3.3

Timelineinfo

01/04/2016 🔍
01/04/2016 +0 days 🔍
01/13/2016 +9 days 🔍
01/13/2016 +0 days 🔍
01/14/2016 +1 days 🔍
02/04/2016 +21 days 🔍
02/05/2016 +1 days 🔍
10/14/2024 +3174 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-70edfbbcef
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-1494 (🔍)
GCVE (CVE): GCVE-0-2016-1494
GCVE (VulDB): GCVE-100-80232
SecurityFocus: 79829 - Python-RSA CVE-2016-1494 Security Bypass Vulnerability

Entryinfo

Created: 01/14/2016 10:44
Updated: 10/14/2024 08:01
Changes: 01/14/2016 10:44 (53), 06/12/2018 10:56 (25), 07/03/2022 09:21 (4), 10/14/2024 08:01 (16)
Complete: 🔍
Cache ID: 216::103

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