Input validation error in lighttpd (Alpine package)

1) Input validation error

EUVDB-ID: #VU33958

Risk: Medium

CVSSv4.0: 5.5 [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:P/U:Green]

CVE-ID: CVE-2011-4362

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

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

Integer signedness error in the base64_decode function in the HTTP authentication functionality (http_auth.c) in lighttpd 1.4 before 1.4.30 and 1.5 before SVN revision 2806 allows remote attackers to cause a denial of service (segmentation fault) via crafted base64 input that triggers an out-of-bounds read with a negative index.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Adobe Commerce (formerly Magento Commerce): 1.12.0.2

lighttpd (Alpine package): 1.1.24 - 1.1.25

lighttpd (Alpine package): 20040311 - 20101020ubuntu158

lighttpd (Alpine package): 1.8.2-2

lighttpd (Alpine package): 0.7.5-0ubuntu1.17 - 0.7.5-0ubuntu1.18

lighttpd (Alpine package): 6.2

lighttpd (Alpine package): before 1.4.30-r0

CPE2.3

• cpe:2.3:a:adobe:magento_commerce:1.12.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:1.1.24:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:1.1.25:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:20040311:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:20040313:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:20040801ubuntu19:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:1.8.2-2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:0.7.5-0ubuntu1.17:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:0.7.5-0ubuntu1.18:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:6.2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:lighttpd_alpine_package:*:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=c1e754dce2c72cab5a8db18929109f882b73a6e3
https://git.alpinelinux.org/aports/commit/?id=5f9a8b27d38d5fd20f3a0c28812129376475de8b
https://git.alpinelinux.org/aports/commit/?id=6f50fc870d684eb2247b563a2719b4b444918778

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. However, proof of concept for this vulnerability is available.