#VU7658 Stack-based buffer overflow in Gnu - CVE-2017-5336

Vulnerability identifier: #VU7658

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-5336

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gnu
Operating systems & Components / Operating system

Vendor: GNU

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

The weakness exists due to improper processing of malicious OpenPGP certificates by the cdk_pk_get_keyid function. A remote attacker can send a specially crafted OpenPGP certificate, trigger stack-based buffer overflow and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 3.3.26 or 3.5.8.

Vulnerable software versions

Gnu: 3.3.0 - 3.5.7

---

External links
https://www.gnutls.org/security.html

---

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.