PuTTY up to 0.65 Terminal Emulator ECH Character Sequence numeric error

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in PuTTY up to 0.65. The affected element is an unknown function of the component Terminal Emulator. Performing a manipulation as part of ECH Character Sequence results in numeric error. This vulnerability is reported as CVE-2015-5309. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in PuTTY up to 0.65 (Connectivity Software). This affects an unknown functionality of the component Terminal Emulator. The manipulation as part of a ECH Character Sequence leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via an ECH (erase characters) escape sequence with a large parameter value, which triggers a buffer underflow.

The weakness was disclosed 12/07/2015 (Website). The advisory is shared at chiark.greenend.org.uk. This vulnerability is uniquely identified as CVE-2015-5309 since 07/01/2015. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 86805 (FreeBSD : PuTTY -- memory corruption in terminal emulator's erase character handling (0cb0afd9-86b8-11e5-bf60-080027ef73ec)), 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 124437 (Fedora Security Update for putty (FEDORA-2015-5)).

Upgrading to version 0.66 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (86805), SecurityFocus (BID 78525†), SecurityTracker (ID 1034308†) and Vulnerability Center (SBV-54861†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
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: 86805
Nessus Name: FreeBSD : PuTTY -- memory corruption in terminal emulator's erase character handling (0cb0afd9-86b8-11e5-bf60-080027ef73ec)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703409
OpenVAS Name: Debian Security Advisory DSA 3409-1 (putty - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PuTTY 0.66

Timelineinfo

07/01/2015 🔍
11/09/2015 +131 days 🔍
11/10/2015 +1 days 🔍
11/11/2015 +1 days 🔍
12/07/2015 +26 days 🔍
12/07/2015 +0 days 🔍
12/08/2015 +1 days 🔍
12/08/2015 +0 days 🔍
12/08/2015 +0 days 🔍
11/23/2024 +3273 days 🔍

Sourcesinfo

Advisory: FEDORA-2015-3d17682c15
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-5309 (🔍)
GCVE (CVE): GCVE-0-2015-5309
GCVE (VulDB): GCVE-100-79437

OVAL: 🔍

SecurityFocus: 78525
SecurityTracker: 1034308
Vulnerability Center: 54861 - PuTTY <0.66 Remote DoS via an ECH Escape Sequence, Medium

Entryinfo

Created: 12/08/2015 10:30
Updated: 11/23/2024 18:10
Changes: 12/08/2015 10:30 (65), 05/17/2018 23:25 (9), 06/28/2022 16:30 (3), 11/23/2024 18:10 (20)
Complete: 🔍
Cache ID: 216::103

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