pam_ssh permits authentication with arbitrary string if a passphrase-less key exists
Published Feb 8, 2007
6.4
MEDIUMCVSS 2.0
EPSS 0.88%
Description
The auth_via_key function in pam_ssh.c in pam_ssh before 1.92, when the allow_blank_passphrase option is disabled, allows remote attackers to bypass authentication restrictions and use private encryption keys requiring a blank passphrase by entering a non-blank passphrase.
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.
AV:N/AC:L/Au:N/C:P/I:P/A:N
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 (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.88% (0.00875) | 57.49th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.83% (0.00833) | 52.70th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.16% (0.00159) | 34.21th | v4 (v2025.03.14) |
| Dec 29, 2024 | 4.10% (0.04097) | 92.04th | v3 (v2023.03.01) |
| Dec 17, 2024 | 5.69% (0.05689) | 93.22th | v3 (v2023.03.01) |
| Jan 20, 2024 | 4.43% (0.04433) | 91.59th | v3 (v2023.03.01) |
| Dec 13, 2023 | 3.18% (0.03177) | 90.11th | v3 (v2023.03.01) |
| Nov 5, 2023 | 2.17% (0.02165) | 88.14th | v3 (v2023.03.01) |
| Sep 28, 2023 | 1.16% (0.01158) | 83.23th | v3 (v2023.03.01) |
| Aug 21, 2023 | 0.59% (0.00593) | 75.56th | v3 (v2023.03.01) |
| Jul 13, 2023 | 0.57% (0.00569) | 74.89th | v3 (v2023.03.01) |
| Jun 5, 2023 | 0.40% (0.00398) | 69.76th | v3 (v2023.03.01) |
| Apr 30, 2023 | 0.43% (0.00433) | 70.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.43% (0.00425) | 70.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
No CWE recorded.
References (9)
- http://osvdb.org/33119 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/24061 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://sourceforge.net/project/shownotes.php?release_id=484376 x_refsource_CONFIRMPatchVendor Advisory
- http://www.securityfocus.com/bid/22461 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2007/0524 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2007-0844 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=430487 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2007-0844
- https://www.cve.org/CVERecord?id=CVE-2007-0844
| Link | Providers | Tags |
|---|---|---|
| http://osvdb.org/33119 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/24061 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://sourceforge.net/project/shownotes.php?release_id=484376 | x_refsource_CONFIRMPatchVendor Advisory | |
| http://www.securityfocus.com/bid/22461 | vdb-entryx_refsource_BID | |
| http://www.vupen.com/english/advisories/2007/0524 | vdb-entryx_refsource_VUPEN | |
| https://access.redhat.com/security/cve/CVE-2007-0844 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=430487 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2007-0844 | ||
| https://www.cve.org/CVERecord?id=CVE-2007-0844 |
Change history (0)
No recorded changes yet.