Stack-based buffer overflow in libproxy (Alpine package)

1) Stack-based buffer overflow

EUVDB-ID: #VU33688

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-4504

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

Exploit availability: No

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 url::get_pac function in url.cpp when processing a large proxy.pac file. A remote unauthenticated attacker can trigger stack-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

Install update from vendor's website.

Vulnerable software versions

libproxy (Alpine package): 0.4.7-r1

CPE2.3

• cpe:2.3:o:alpine:libproxy_alpine_package:0.4.7-r1:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=ce21b58fb0d0d72355d617cafb5ad313f797f1ab
http://git.alpinelinux.org/aports/commit/?id=d043b9a3153b51e86ca7aa15dad872c28bb094d0
http://git.alpinelinux.org/aports/commit/?id=02ce8a55c740b8a702d035d196a65e4a03725db0
http://git.alpinelinux.org/aports/commit/?id=2ab6001862262b6187a7da9694daca22f647d05d

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.