Buffer overflow in libidn (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU32284

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-2059

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The stringprep_utf8_to_ucs4 function in libin before 1.31, as used in jabberd2, allows context-dependent attackers to read system memory and possibly have other unspecified impact via invalid UTF-8 characters in a string, which triggers an out-of-bounds read.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Tivoli Storage Manager: 6.1.4

libidn (Alpine package): 2.10.7ubuntu3

libidn (Alpine package): 3.0pl1-69

libidn (Alpine package): 5.2.1-2 - 5.93-3

libidn (Alpine package): 0.9.2

libidn (Alpine package): 0.2.5

libidn (Alpine package): 7.3.0.118

libidn (Alpine package):

libidn (Alpine package): before 1.31-r0

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_tivoli_storage_manager:6.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:2.10.7ubuntu3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:3.0pl1-69:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:5.2.1-2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:5.93-3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:0.9.2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:0.2.5:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:7.3.0.118:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package::*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libidn_alpine_package:*:*:*:*:*:alpine_linux:*:3.1

External links

https://git.alpinelinux.org/aports/commit/?id=a2b2fff7d43c71ecc89002de88d855f730975a58
https://git.alpinelinux.org/aports/commit/?id=5bafcce1dd15bf47e71e22042af62ece632ebe5d

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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