OpenSUSE Linux update for libidn2

Published: 2019-12-03
Severity High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-12290
CVE-2019-18224
CWE ID CWE-20
CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software Opensuse Subscribe
Vendor Novell

Security Advisory

1) Input validation error

Severity: Low

CVSSv3: 3.7 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12290

CWE-ID: CWE-20 - Improper Input Validation

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to libidn2 fails to perform roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. A remote attacker can use a specially crafted domain name to impersonate a trusted website.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 15.0

CPE External links

https://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Heap-based buffer overflow

Severity: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-18224

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the idn2_to_ascii_4i() function in lib/lookup.c when processing domain names. A remote attacker can trick the victim to visit a specially crafted website, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 15.0

CPE External links

https://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.