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CVE-2007-0844

17
FAUCET Score

CVE-2007-0844 describes a bypass vulnerability in pam_ssh versions prior to 1.92, specifically within the auth_via_key function when the allow_blank_passphrase option is disabled. This flaw allows remote attackers to authenticate using private encryption keys that require a blank passphrase by instead providing a non-blank passphrase. With a CVSS score of 6.4 (medium severity), this vulnerability has a low attack complexity and requires no authentication, potentially leading to partial confidentiality and integrity impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.91CPE matchmatch criteria
cpe:2.3:a:pam_ssh:pam_ssh:1.91:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.4MEDIUM

AV:N/AC:L/Au:N/C:P/I:P/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.83%
Probability of exploitation in next 30 days
EPSS Percentile
53.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0083 is in the 34th percentile among its peer group of 23,701 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2007-0844Moderate

pam_ssh permits authentication with arbitrary string if a passphrase-less key exists

Nov 7, 2006

References

osvdb.org / 33119
secunia.com / advisories/24061
Vendor Advisory
sourceforge.net / project/shownotes.php
PatchVendor Advisory
securityfocus.com / bid/22461
vupen.com / english/advisories/2007/0524