Gnu Libidn2 vulnerabilities

4 vulnerabilities

Known vulnerabilities in Gnu Libidn2, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

9.8CVE-2017-14061gnulibidn2
EPSS score
2.40%
Integer overflow in the _isBidi function in bidi.c in Libidn2 before 2.0.4 allows remote attackers to cause a denial of service or possibly have unspecified other impact.9.8CVE-2017-14062debianlibidn+14
EPSS score
3.89%
Integer overflow in the decode_digit function in puny_decode.c in Libidn2 before 2.0.4 allows remote attackers to cause a denial of service or possibly have unspecified other impact.9.8CVE-2019-18224alpinelibidn2+12
EPSS score
3.71%
idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string.7.5CVE-2019-12290alpinelibidn2+6
EPSS score
3.23%
GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. This makes it possible in some circumstances for one domain to impersonate another. By creating a malicious domain that matches a target domain except for the inclusion of certain punycoded Unicode characters (that would be discarded when converted first to a Unicode label and then back to an ASCII label), arbitrary domains can be impersonated.