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CVE-2009-0124

15
FAUCET Score

CVE-2009-0124 describes a vulnerability in the American Radio Relay League (ARRL) tqsllib 2.0, specifically within the tqsl_verifyDataBlock function. This flaw allows remote attackers to bypass certificate chain validation by submitting a malformed SSL/TLS signature, due to improper checking of the OpenSSL EVP_VerifyFinal function's return value. With a CVSS score of 5.0, this vulnerability is of medium severity, requiring no authentication and having low attack complexity, potentially leading to information disclosure (C:P). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.0CPE matchmatch criteria
cpe:2.3:a:arrl:tqsllib:2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.32%
Probability of exploitation in next 30 days
EPSS Percentile
67.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0132 is in the 48th 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-2009-0124Important

tqsllib: OpenSSL incorrect checks for malformed signatures

Jan 11, 2009

References

bugs.debian.org / cgi-bin/bugreport.cgi
Exploit
openwall.com / lists/oss-security/2009/01/12/4
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/33543
redhat.com / archives/fedora-package-announce/2009-January/msg00557.html