Heap-based buffer overflow in zziplib (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU33258

Risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-5976

CWE-ID: CWE-122 - Heap-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 in Heap-based buffer overflow in the zzip_mem_entry_extra_block function in memdisk.c in zziplib 0.13.62. A remote attacker can use a crafted ZIP file. to trigger heap-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

zziplib (Alpine package): 0.13.62-r3 - 0.13.66-r0

CPE2.3

• cpe:2.3:a:alpine:zziplib_alpine_package:0.13.62-r3:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:a:alpine:zziplib_alpine_package:0.13.66-r0:*:*:*:*:alpine_linux:*:3.6

External links

https://git.alpinelinux.org/aports/commit/?id=0d63e91d8335243de1323728d20aa6b1d9418207
https://git.alpinelinux.org/aports/commit/?id=5227a60eeadc0abcc896b0db71ac19cf82a7c744

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.