CVE-2018-16151 Security feature bypass in n/a

What is CVE-2018-16151?

CVE-2018-16151 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 26 Sep 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In verify_emsa_pkcs1_signature() in gmp_rsa_public_key.c in the gmp plugin in strongSwan 4.x and 5.x before 5.7.0, the RSA implementation based on GMP does not reject excess data after the encoded algorithm OID during PKCS#1 v1.5 signature verification. Similar to the flaw in the same version of strongSwan regarding digestAlgorithm.parameters, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation when only an RSA signature is used for IKEv2 authentication.

Weakness: CWE-347

Which versions are affected by CVE-2018-16151?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Strongswan Strongswan.

How do I fix CVE-2018-16151?

Upgrade to a fixed version.

Is CVE-2018-16151 being exploited?

There is no known exploitation of CVE-2018-16151 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2018-16151, DEBIAN-CVE-2018-16151, GHSA-6w9w-qmvw-3v7q, UBUNTU-CVE-2018-16151.