Buffer overflow in libcroco (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU19192

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-8834

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the "cr_tknzr_parse_comment" function, as defined in the "src/cr-tknzr.c" file. A remote attacker can persuade a user to access a CSS file that submits malicious input to the system, trigger memory corruption and cause a DoS condition on the affected system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libcroco (Alpine package): 0.6.12-r0 - 0.6.13-r0

CPE2.3

• cpe:2.3:a:alpine:libcroco_alpine_package:0.6.12-r0:*:*:*:*:alpine_linux:*:3.6
• cpe:2.3:a:alpine:libcroco_alpine_package:0.6.12-r1:*:*:*:*:alpine_linux:*:3.7
• cpe:2.3:a:alpine:libcroco_alpine_package:0.6.12-r2:*:*:*:*:alpine_linux:*:3.8

External links

https://git.alpinelinux.org/aports/commit/?id=53117e88842824a662a82bbaa78ba2cd304de7a4
https://git.alpinelinux.org/aports/commit/?id=1e378edcf6caaa3ed5646459e4c8a47234afa01a
https://git.alpinelinux.org/aports/commit/?id=3753b9e3f39d049e7c6c6664bbed67a0f2bef958
https://git.alpinelinux.org/aports/commit/?id=85c36973699d153bb24ba142388731920ae19b92
https://git.alpinelinux.org/aports/commit/?id=ac4f22e825980b99d4fd80cb49d11ff7be0e3e3a
https://git.alpinelinux.org/aports/commit/?id=fdbea192e0aafd3afbdcd17d061efff9de618664

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.