Out-of-bounds read in pcre (Alpine package)

1) Out-of-bounds read

EUVDB-ID: #VU7565

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-2017-7244

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The weakness exists due to invalid memory read flaw in the _pcre32_xclass function in pcre_xclass.c. A remote attacker can trick the victim into loading a specially crafted file and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

pcre (Alpine package): 8.40-r2

CPE2.3

• cpe:2.3:o:alpine:pcre_alpine_package:8.40-r2:*:*:*:*:alpine_linux:*:3.5

External links

https://git.alpinelinux.org/aports/commit/?id=ddd6855fbf390add5ba3fb78e8db3c8a08d09369

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.