PyCrypto block_templace.c ALGnew iv memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in PyCrypto and classified as critical. Impacted is the function ALGnew of the file block_templace.c. Performing a manipulation of the argument iv results in memory corruption. This vulnerability is identified as CVE-2013-7459. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in PyCrypto (the affected version unknown). It has been classified as critical. This affects the function ALGnew of the file block_templace.c. The manipulation of the argument iv with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in the ALGnew function in block_templace.c in Python Cryptography Toolkit (aka pycrypto) allows remote attackers to execute arbitrary code as demonstrated by a crafted iv parameter to cryptmsg.py.

The bug was discovered 12/27/2016. The weakness was released 02/16/2017 (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2013-7459 since 12/27/2016. 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 was handled as a non-public zero-day exploit for at least 20 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 96552 (openSUSE Security Update : python-pycrypto (openSUSE-2017-86)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351116 (Amazon Linux Security Advisory for python-crypto: AL2012-2017-210).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (96552) and SecurityFocus (BID 95122†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: 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: 96552
Nessus Name: openSUSE Security Update : python-pycrypto (openSUSE-2017-86)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for python-crypto FEDORA-2017-7c569d396b
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/26/2016 🔍
12/27/2016 +1 days 🔍
12/27/2016 +0 days 🔍
01/16/2017 +20 days 🔍
01/17/2017 +1 days 🔍
02/15/2017 +29 days 🔍
02/16/2017 +1 days 🔍
02/16/2017 +0 days 🔍
08/14/2020 +1275 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-7459 (🔍)
GCVE (CVE): GCVE-0-2013-7459
GCVE (VulDB): GCVE-100-96981
SecurityFocus: 95122 - PyCrypto 'cryptmsg.py' Buffer Overflow Vulnerability
OSVDB: - CVE-2013-7459 - PyCrypto - Buffer Overflow Issue

Entryinfo

Created: 02/16/2017 08:54
Updated: 08/14/2020 20:17
Changes: 02/16/2017 08:54 (72), 08/14/2020 20:17 (6)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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