Simon Tatham PuTTY up to 2010-06-01 DSA Signature memory corruption

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7.0	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Simon Tatham PuTTY and classified as problematic. Affected by this issue is some unknown functionality of the component DSA Signature Handler. This manipulation causes memory corruption. This vulnerability is handled as CVE-2013-4207. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Simon Tatham PuTTY (Connectivity Software). Affected by this vulnerability is an unknown part of the component DSA Signature Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.

The weakness was released 08/06/2013 as confirmed mailinglist post (oss-sec). The advisory is shared at seclists.org. The public release was coordinated with Simon Tatham. This vulnerability is known as CVE-2013-4207 since 06/12/2013. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 69313 (Debian DSA-2736-1 : putty - several vulnerabilities), 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 166403 (OpenSuSE Security Update for Filezilla (openSUSE-SU-2013:1347-1)).

Upgrading to version 0.63 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (69313), SecurityFocus (BID 61649†), OSVDB (96080†), Secunia (SA54354†) and Vulnerability Center (SBV-40973†). Entries connected to this vulnerability are available at VDB-9860, VDB-9902 and VDB-9945. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Connectivity Software

Vendor

• Simon Tatham

Name

• PuTTY

Version

• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.53b
• 0.54
• 0.55
• 0.56
• 0.57
• 0.58
• 0.59
• 0.60
• 0.61
• 0.62
• 2010-06-01

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

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

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 69313
Nessus Name: Debian DSA-2736-1 : putty - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 892736
OpenVAS Name: Debian Security Advisory DSA 2736-1 (putty - several vulnerabilities
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: PuTTY 0.63

Timelineinfo

06/12/2013 🔍
08/05/2013 +54 days 🔍
08/05/2013 +0 days 🔍
08/05/2013 +0 days 🔍
08/06/2013 +1 days 🔍
08/06/2013 +0 days 🔍
08/12/2013 +6 days 🔍
08/12/2013 +0 days 🔍
08/19/2013 +7 days 🔍
05/21/2021 +2832 days 🔍

Sourcesinfo

Advisory: seclists.org
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-4207 (🔍)
GCVE (CVE): GCVE-0-2013-4207
GCVE (VulDB): GCVE-100-9901

OVAL: 🔍

SecurityFocus: 61649 - PuTTY DSA Signature CVE-2013-4207 Remote Buffer Overflow Vulnerability
Secunia: 54354 - PuTTY Multiple Integer Overflow Vulnerabilities, Moderately Critical
OSVDB: 96080
Vulnerability Center: 40973 - PuTTY 0.52 - 0.62 \x27bignum_cmp()\x27 Function Buffer Overflow Vulnerability Allows Remote DoS, Medium

See also: 🔍

Entryinfo

Created: 08/12/2013 15:16
Updated: 05/21/2021 10:07
Changes: 08/12/2013 15:16 (78), 05/08/2017 09:03 (4), 05/21/2021 10:07 (3)
Complete: 🔍
Committer:
Cache ID: 216:EAE:103

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