Stack-based buffer overflow in openldap (Alpine package)

1) Stack-based buffer overflow

EUVDB-ID: #VU16671

Risk: Low

CVSSv4.0: 6.6 [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:U/U:Clear]

CVE-ID: CVE-2017-17740

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error шт contrib/slapd-modules/nops/nops.c when both the nops module and the memberof overlay are enabled. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause slapd crash via a member MODDN operation.

Mitigation

Install update from vendor's website.

Vulnerable software versions

openldap (Alpine package): 2.4.45-r3 - 2.4.45-r4

CPE2.3

• cpe:2.3:o:alpine:openldap_alpine_package:2.4.45-r3:*:*:*:*:alpine_linux:*:3.6
• cpe:2.3:o:alpine:openldap_alpine_package:2.4.45-r4:*:*:*:*:alpine_linux:*:3.7

External links

https://git.alpinelinux.org/aports/commit/?id=d2d4b8f40c5ce345d2fa7e6812b200450f4d1973
https://git.alpinelinux.org/aports/commit/?id=eb7c99fb435406b592f0b923ab91a380ed04eb64
https://git.alpinelinux.org/aports/commit/?id=f433608cc24c7e7a214a41e87b5c323e562f779d
https://git.alpinelinux.org/aports/commit/?id=245b526abb5493a981c7ad33f9a6b264fcd11265
https://git.alpinelinux.org/aports/commit/?id=9eb2f7f4d4ac07bbabe6a18f96444a50fc2cc5b2
https://git.alpinelinux.org/aports/commit/?id=fad85a325388ffbdb0f30f6396fdb8188f0725ac
https://git.alpinelinux.org/aports/commit/?id=1577fdac86398b4de62cbf6973cef8ddddef0f71

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.