CVE-2017-5336 Explained : Impact and Mitigation
Learn about CVE-2017-5336, a stack-based buffer overflow vulnerability in GnuTLS versions before 3.3.26 and 3.5.x before 3.5.8, allowing remote attackers to exploit the issue via a crafted OpenPGP certificate.
GnuTLS before 3.3.26 and 3.5.x before 3.5.8 is vulnerable to a stack-based buffer overflow in the cdk_pk_get_keyid function.
Understanding CVE-2017-5336
What is CVE-2017-5336?
The cdk_pk_get_keyid function in GnuTLS versions before 3.3.26 and 3.5.x before 3.5.8 is susceptible to a stack-based buffer overflow, allowing remote attackers to exploit this vulnerability via a crafted OpenPGP certificate.
The Impact of CVE-2017-5336
This vulnerability could lead to unspecified consequences when exploited by remote attackers through a specially crafted OpenPGP certificate.
Technical Details of CVE-2017-5336
Vulnerability Description
The cdk_pk_get_keyid function in lib/opencdk/pubkey.c in GnuTLS versions before 3.3.26 and 3.5.x before 3.5.8 is vulnerable to a stack-based buffer overflow.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions affected: n/a
Exploitation Mechanism
Remote attackers can exploit this vulnerability through a specially crafted OpenPGP certificate.
Mitigation and Prevention
Immediate Steps to Take
- Update GnuTLS to version 3.3.26 or 3.5.8 to mitigate the vulnerability.
- Monitor vendor advisories for patches and apply them promptly.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Implement network security measures to prevent remote exploitation.
Patching and Updates
Ensure timely patching of GnuTLS to the latest secure version.