Stack-based buffer overflow in cairo (Alpine package)

1) Stack-based buffer overflow

EUVDB-ID: #VU52196

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-35492

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

A flaw was found in cairo's image-compositor.c in all versions prior to 1.17.4. This flaw allows an attacker who can provide a crafted input file to cairo's image-compositor (for example, by convincing a user to open a file in an application using cairo, or if an application uses cairo on untrusted input) to cause a stack buffer overflow -> out-of-bounds WRITE. The highest impact from this vulnerability is to confidentiality, integrity, as well as system availability.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cairo (Alpine package): 1.16.0-r2

External links

http://git.alpinelinux.org/aports/commit/?id=278d4e0fd8637ea4fa81c81479667e53d780a2c4
http://git.alpinelinux.org/aports/commit/?id=695dc71caaea33c41d49cd570e1114a4b9c06f52
http://git.alpinelinux.org/aports/commit/?id=78fa1347e9eb727b9dbf934fdf2caaf5d2dd0e71
http://git.alpinelinux.org/aports/commit/?id=878aaaa04afb1dc84a3c0cc86895cf8658e8f36f
http://git.alpinelinux.org/aports/commit/?id=e1bf8a1c0ad9020721d6706963a12e9cba928cb1

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.