Input validation error in bind (Alpine package)

1) Input validation error

EUVDB-ID: #VU33963

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-1910

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

Off-by-one error in named in ISC BIND 9.x before 9.7.3-P1, 9.8.x before 9.8.0-P2, 9.4-ESV before 9.4-ESV-R4-P1, and 9.6-ESV before 9.6-ESV-R4-P1 allows remote DNS servers to cause a denial of service (assertion failure and daemon exit) via a negative response containing large RRSIG RRsets.

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.6.1-r0 - 9.8.0_p4-r0

CPE2.3

• cpe:2.3:o:alpine:bind_alpine_package:9.8.0_p4-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:bind_alpine_package:9.7.3-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:bind_alpine_package:9.7.4_p1-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=8ad6b2df1f338baa4506e898f6ff74c5741dbfc5
http://git.alpinelinux.org/aports/commit/?id=f61c11fdfa57a06c4775c87326125f59b6992aaa

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.