Buffer access with incorrect length value in Aconf

1) Buffer access with incorrect length value

EUVDB-ID: #VU11318

Risk: Medium

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2011-4971

CWE-ID: CWE-805 - Buffer Access with Incorrect Length Value

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the (1) process_bin_sasl_auth, (2) process_bin_complete_sasl_auth, (3) process_bin_update, and (4) process_bin_append_prepend functions due to a large body length value in a packet. A remote attacker can trigger memory corruption and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

memcached (Alpine package): 1.4.13-r0 - 1.4.21-r1

: 0.4.0-r1

CPE2.3

• cpe:2.3:a:alpine:memcached_alpine_package:1.4.13-r0:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:a:alpine:memcached_alpine_package:1.4.15-r0:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:a:alpine:memcached_alpine_package:1.4.15-r1:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3::::0.4.0-r1:*:*:*:*:alpine_linux:*:3.1

External links

https://git.alpinelinux.org/aports/commit/?id=0c687f1c851d551be7c3629cc607b0778b5e174e
https://git.alpinelinux.org/aports/commit/?id=6bf81f56e8c0b362d9c5ed046d9a8cdb81d5d957
https://git.alpinelinux.org/aports/commit/?id=19a372186aeaae2a527ff34ceed5eb00d9738c00
https://git.alpinelinux.org/aports/commit/?id=54688a01bb296d0f63a940565b20d110c3aa00e6
https://git.alpinelinux.org/aports/commit/?id=1d52afcd87e9468934e941b8d3a0cdb8e7954490
https://git.alpinelinux.org/aports/commit/?id=82a118c6ad22de1fd39186499c9bf1e3d58d9de6
https://git.alpinelinux.org/aports/commit/?id=deded5f6427a47a48eac3311151c147dab49cdd6

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, a fully functional exploit for this vulnerability is available.