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CVE-2019-12290

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202003-63
Posted Mar 30, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202003-63 - Multiple vulnerabilities have been found in GNU IDN Library 2, the worst of which could result in the remote execution of arbitrary code. Versions less than 2.2.0 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2019-12290, CVE-2019-18224
SHA-256 | 53fb6354b0d8ed24a8a1cf0c1606c26800da39fd68fec33fe50b30cd527397ec
Ubuntu Security Notice USN-4168-1
Posted Oct 29, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4168-1 - It was discovered that Libidn2 incorrectly handled certain inputs. A attacker could possibly use this issue to impersonate domains. It was discovered that Libidn2 incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-12290, CVE-2019-18224
SHA-256 | cf79bda79ca9397f2b33a211436016b37be02011ced052fcfc31479870124c25
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