MEDIUM
Implementations of SSH version 1.5, including (1) OpenSSH up to version 2.3.0, (2) AppGate, and (3) ssh-1 up to version 1.2.31, in certain configurations, allow a remote attacker to decrypt and/or alter traffic via a "Bleichenbacher attack" on PKCS#1 version 1.5
Published Sep 18, 2001
4.0
MEDIUMCVSS 2.0
EPSS 2.50%
Description
Implementations of SSH version 1.5, including (1) OpenSSH up to version 2.3.0, (2) AppGate, and (3) ssh-1 up to version 1.2.31, in certain configurations, allow a remote attacker to decrypt and/or alter traffic via a "Bleichenbacher attack" on PKCS#1 version 1.5.
Affected products
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.
4.0 MEDIUM NVD
AV:N/AC:H/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.50% 0.02501
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02501
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.50% (0.02501) | 84.14th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.84% (0.02841) | 84.78th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.31% (0.01308) | 78.42th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.36% (0.00357) | 72.95th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.36% (0.00357) | 71.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00357) | 67.65th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
Weaknesses (1)
References (10)
- ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:24.ssh.asc vendor-advisoryx_refsource_FREEBSD
- http://marc.info/?l=bugtraq&m=98158450021686&w=2 mailing-listx_refsource_BUGTRAQ
- http://www.ciac.org/ciac/bulletins/l-047.shtml third-party-advisorygovernment-resourcex_refsource_CIAC
- http://www.debian.org/security/2001/dsa-023 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2001/dsa-027 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2001/dsa-086 vendor-advisoryx_refsource_DEBIAN
- http://www.novell.com/linux/security/advisories/adv004_ssh.html vendor-advisoryx_refsource_SUSE
- http://www.osvdb.org/2116 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/2344 vdb-entryx_refsource_BIDPatchVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6082 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:24.ssh.asc | vendor-advisoryx_refsource_FREEBSD | |
| http://marc.info/?l=bugtraq&m=98158450021686&w=2 | mailing-listx_refsource_BUGTRAQ | |
| http://www.ciac.org/ciac/bulletins/l-047.shtml | third-party-advisorygovernment-resourcex_refsource_CIAC | |
| http://www.debian.org/security/2001/dsa-023 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.debian.org/security/2001/dsa-027 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.debian.org/security/2001/dsa-086 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.novell.com/linux/security/advisories/adv004_ssh.html | vendor-advisoryx_refsource_SUSE | |
| http://www.osvdb.org/2116 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/bid/2344 | vdb-entryx_refsource_BIDPatchVendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/6082 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 18, 2001
Updated Aug 8, 2024
Reserved May 24, 2001
Link CVE-2001-0361
CISA Vulnrichment
Updated n/a