Cryptographic issues in jansson (Alpine package)

1) Cryptographic issues

EUVDB-ID: #VU32567

Risk: Medium

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

CVE-ID: CVE-2013-6401

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Jansson, possibly 2.4 and earlier, does not restrict the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted JSON document.

Mitigation

Install update from vendor's website.

Vulnerable software versions

jansson (Alpine package): 2.4-r1 - 2.7-r1

CPE2.3

• cpe:2.3:a:alpine:jansson_alpine_package:2.4-r1:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:a:alpine:jansson_alpine_package:2.5-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:jansson_alpine_package:2.6-r0:*:*:*:*:alpine_linux:*:2.5

External links

https://git.alpinelinux.org/aports/commit/?id=70c29d512d30387751af66f02d0a98e955a993b0
https://git.alpinelinux.org/aports/commit/?id=a48dd9fb484b74733e8b1c6827712e9770eafe16
https://git.alpinelinux.org/aports/commit/?id=279f4a4c6452ebf64cd549b29d3d4ec7ed7d53b2

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.