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TI-2013-03678 Aliases CVE-2013-4206GHSA-h3qw-gcpw-f6mg

Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows…

Priority LOW 35CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Code execution
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.

Why it matters now

EPSS 0.02475 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 20

CPEVersionsRoleVendor
cpe:2.3:a:putty:putty:0.45:*:*:*:*:*:*:*0.45VulnerablePuTTY
cpe:2.3:a:putty:putty:0.46:*:*:*:*:*:*:*0.46VulnerablePuTTY
cpe:2.3:a:putty:putty:0.47:*:*:*:*:*:*:*0.47VulnerablePuTTY
cpe:2.3:a:putty:putty:0.48:*:*:*:*:*:*:*0.48VulnerablePuTTY
cpe:2.3:a:putty:putty:0.49:*:*:*:*:*:*:*0.49VulnerablePuTTY
cpe:2.3:a:putty:putty:0.50:*:*:*:*:*:*:*0.50VulnerablePuTTY
cpe:2.3:a:putty:putty:0.51:*:*:*:*:*:*:*0.51VulnerablePuTTY
cpe:2.3:a:putty:putty:0.52:*:*:*:*:*:*:*0.52VulnerablePuTTY
cpe:2.3:a:putty:putty:0.53b:*:*:*:*:*:*:*0.53bVulnerablePuTTY
cpe:2.3:a:putty:putty:0.54:*:*:*:*:*:*:*0.54VulnerablePuTTY
  • cpe:2.3:a:putty:putty:0.45:*:*:*:*:*:*:* Versions 0.45 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.46:*:*:*:*:*:*:* Versions 0.46 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.47:*:*:*:*:*:*:* Versions 0.47 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.48:*:*:*:*:*:*:* Versions 0.48 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.49:*:*:*:*:*:*:* Versions 0.49 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.50:*:*:*:*:*:*:* Versions 0.50 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.51:*:*:*:*:*:*:* Versions 0.51 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.52:*:*:*:*:*:*:* Versions 0.52 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.53b:*:*:*:*:*:*:* Versions 0.53b Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.54:*:*:*:*:*:*:* Versions 0.54 Vulnerable ·PuTTY
Show 10 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:putty:putty:0.55:*:*:*:*:*:*:*0.55VulnerablePuTTY
cpe:2.3:a:putty:putty:0.56:*:*:*:*:*:*:*0.56VulnerablePuTTY
cpe:2.3:a:putty:putty:0.57:*:*:*:*:*:*:*0.57VulnerablePuTTY
cpe:2.3:a:putty:putty:0.58:*:*:*:*:*:*:*0.58VulnerablePuTTY
cpe:2.3:a:putty:putty:0.59:*:*:*:*:*:*:*0.59VulnerablePuTTY
cpe:2.3:a:putty:putty:0.60:*:*:*:*:*:*:*0.60VulnerablePuTTY
cpe:2.3:a:putty:putty:0.61:*:*:*:*:*:*:*0.61VulnerablePuTTY
cpe:2.3:a:putty:putty:2010-06-01:r8967:*:*:development_snapshot:*:*:*2010-06-01 r8967VulnerablePuTTY
cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:*up to 0.62VulnerableSimon Tatham
cpe:2.3:a:simon_tatham:putty:0.53:*:*:*:*:*:*:*0.53VulnerableSimon Tatham
  • cpe:2.3:a:putty:putty:0.55:*:*:*:*:*:*:* Versions 0.55 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.56:*:*:*:*:*:*:* Versions 0.56 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.57:*:*:*:*:*:*:* Versions 0.57 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.58:*:*:*:*:*:*:* Versions 0.58 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.59:*:*:*:*:*:*:* Versions 0.59 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.60:*:*:*:*:*:*:* Versions 0.60 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:0.61:*:*:*:*:*:*:* Versions 0.61 Vulnerable ·PuTTY
  • cpe:2.3:a:putty:putty:2010-06-01:r8967:*:*:development_snapshot:*:*:* Versions 2010-06-01 r8967 Vulnerable ·PuTTY
  • cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:* Versions up to 0.62 Vulnerable ·Simon Tatham
  • cpe:2.3:a:simon_tatham:putty:0.53:*:*:*:*:*:*:* Versions 0.53 Vulnerable ·Simon Tatham

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2013-4206
  2. 2026-10-03 Alias added: GHSA-h3qw-gcpw-f6mg

References

Patch 1

Advisory 3

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences