Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow
Published Dec 1, 2004
10.0
HIGHCVSS 2.0
EPSS 7.36%
Description
Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.
Affected products
No data.
- 0.48
- 0.49
- 0.50
- 0.51
- 0.52
- 0.53
- 0.53b
- 0.54
- 0.55
- 1.8
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.36% (0.07363) | 94.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.42% (0.07423) | 93.64th | v5 (v2026.06.15) |
| Feb 18, 2026 | 9.18% (0.09179) | 92.51th | v4 (v2025.03.14) |
| Mar 30, 2025 | 21.63% (0.21634) | 95.24th | v4 (v2025.03.14) |
| Mar 29, 2025 | 27.63% (0.27634) | 94.33th | v4 (v2025.03.14) |
| Mar 17, 2025 | 21.63% (0.21634) | 95.26th | v4 (v2025.03.14) |
| Dec 17, 2024 | 9.67% (0.09674) | 94.79th | v3 (v2023.03.01) |
| Nov 8, 2023 | 12.09% (0.12092) | 94.80th | v3 (v2023.03.01) |
| Mar 7, 2023 | 16.07% (0.16069) | 95.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 11.27% (0.11270) | 95.02th | v2 (v2022.01.01) |
| Apr 1, 2022 | 11.27% (0.11270) | 94.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 11.27% (0.11270) | 88.71th | v2 (v2022.01.01) |
No CWE recorded.
References (11)
- http://marc.info/?l=bugtraq&m=109889312917613&w=2 mailing-listx_refsource_BUGTRAQ
- http://secunia.com/advisories/12987/ third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/13012/ third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/17214 third-party-advisoryx_refsource_SECUNIA
- http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002414 x_refsource_CONFIRM
- http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002416 x_refsource_CONFIRM
- http://www.chiark.greenend.org.uk/~sgtatham/putty/ x_refsource_CONFIRM
- http://www.gentoo.org/security/en/glsa/glsa-200410-29.xml vendor-advisoryx_refsource_GENTOOPatchVendor Advisory
- http://www.idefense.com/application/poi/display?id=155&type=vulnerabilities&flashstatus=true third-party-advisoryx_refsource_IDEFENSE
- http://www.securityfocus.com/bid/11549 vdb-entryx_refsource_BIDPatchVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/17886 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://marc.info/?l=bugtraq&m=109889312917613&w=2 | mailing-listx_refsource_BUGTRAQ | |
| http://secunia.com/advisories/12987/ | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/13012/ | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/17214 | third-party-advisoryx_refsource_SECUNIA | |
| http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002414 | x_refsource_CONFIRM | |
| http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002416 | x_refsource_CONFIRM | |
| http://www.chiark.greenend.org.uk/~sgtatham/putty/ | x_refsource_CONFIRM | |
| http://www.gentoo.org/security/en/glsa/glsa-200410-29.xml | vendor-advisoryx_refsource_GENTOOPatchVendor Advisory | |
| http://www.idefense.com/application/poi/display?id=155&type=vulnerabilities&flashstatus=true | third-party-advisoryx_refsource_IDEFENSE | |
| http://www.securityfocus.com/bid/11549 | vdb-entryx_refsource_BIDPatchVendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/17886 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.