Stack-based buffer overflow in pcre (Alpine package)

1) Stack-based buffer overflow

EUVDB-ID: #VU32304

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-3191

CWE-ID: CWE-121 - Stack-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 within the compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22 mishandles patterns containing an (*ACCEPT) substring when processing a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror, aka ZDI-CAN-3542. A remote unauthenticated attacker can trigger stack-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

pcre (Alpine package): 8.01-r0 - 8.38-r0

CPE2.3

• cpe:2.3:o:alpine:pcre_alpine_package:8.01-r0:*:*:*:*:alpine_linux:*:1.10
• cpe:2.3:o:alpine:pcre_alpine_package:8.10-r0:*:*:*:*:alpine_linux:*:2.0
• cpe:2.3:o:alpine:pcre_alpine_package:8.12-r0:*:*:*:*:alpine_linux:*:2.2

External links

https://git.alpinelinux.org/aports/commit/?id=35fe84176600346a226a215c77bb72de92153438
https://git.alpinelinux.org/aports/commit/?id=1cabd618771bbdcfb71da232ac9b9d5719e62ec3
https://git.alpinelinux.org/aports/commit/?id=359021806e9962819c3971a628eed78c605d3f4f

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.