Auth bypass in Arrl Tqsllib
CVE-2009-0124
The tqsl_verifyDataBlock function in openssl_cert.cpp in American Radio Relay League (ARRL) tqsllib 2.0 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.013 (69.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Arrl Tqsllib — versions 2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openwall.com/lists/oss-security/2009/01/12/4 (mailing-list)
- secunia.com/advisories/33543 (third-party-advisory)
- www.redhat.com/archives/fedora-package-announce/2009-January/msg00557.html (vendor-advisory)
- bugs.debian.org/cgi-bin/bugreport.cgi (Exploit)
- bugzilla.redhat.com/show_bug.cgi
Frequently asked questions
- What is CVE-2009-0124?
- CVE-2009-0124 is a vulnerability in Arrl Tqsllib, classified under Improper Authentication. Published 2009-01-15.
- Is CVE-2009-0124 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.