Dlitz PyCrypto up to 2.6 Pseudo-Random Number Generator Crypto.Random.atfork cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Dlitz PyCrypto up to 2.6. Affected is the function Crypto.Random.atfork of the component Pseudo-Random Number Generator. Performing a manipulation results in cryptographic issue. This vulnerability is identified as CVE-2013-1445. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Dlitz PyCrypto up to 2.6. This affects the function Crypto.Random.atfork of the component Pseudo-Random Number Generator. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality. The summary by CVE is:

The Crypto.Random.atfork function in PyCrypto before 2.6.1 does not properly reseed the pseudo-random number generator (PRNG) before allowing a child process to access it, which makes it easier for context-dependent attackers to obtain sensitive information by leveraging a race condition in which a child process is created and accesses the PRNG within the same rate-limit period as another process.

The weakness was released 10/26/2013 (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2013-1445 since 01/26/2013. 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. MITRE ATT&CK project uses the attack technique T1600 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 70503 (Debian DSA-2781-1 : python-crypto - PRNG not correctly reseeded in some situations), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350501 (Amazon Linux Security Advisory for python-crypto: ALAS-2013-243).

Upgrading to version 1.0.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (88132), Tenable (70503), SecurityFocus (BID 63201†) and Vulnerability Center (SBV-42108†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
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: 70503
Nessus Name: Debian DSA-2781-1 : python-crypto - PRNG not correctly reseeded in some situations
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892781
OpenVAS Name: Debian Security Advisory DSA 2781-1 (python-crypto - PRNG not correctly reseeded in some situations
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PyCrypto 1.0.1
Patch: github.com

Timelineinfo

01/26/2013 🔍
10/17/2013 +264 days 🔍
10/20/2013 +3 days 🔍
10/26/2013 +6 days 🔍
10/26/2013 +0 days 🔍
10/27/2013 +1 days 🔍
03/24/2015 +513 days 🔍
12/27/2024 +3566 days 🔍

Sourcesinfo

Product: github.com

Advisory: DSA-2781
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-1445 (🔍)
GCVE (CVE): GCVE-0-2013-1445
GCVE (VulDB): GCVE-100-65361

OVAL: 🔍

X-Force: 88132
SecurityFocus: 63201
Vulnerability Center: 42108 - PyCrypto Before 2.6.1 Remote Information Disclosure Vulnerability Due to a Flaw In the Crypto.Random.atfork Function, Medium

Entryinfo

Created: 03/24/2015 15:54
Updated: 12/27/2024 22:29
Changes: 03/24/2015 15:54 (66), 05/14/2017 09:47 (3), 01/08/2022 23:09 (4), 01/08/2022 23:21 (1), 01/08/2022 23:31 (2), 12/27/2024 22:29 (20)
Complete: 🔍
Cache ID: 216:49F:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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