Vulnerability in Xelerance Openswan
CVE-2018-15836
In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.
EPSS: 0.015 (72.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Xelerance Openswan
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Vendor Advisory, mailing-list, x_refsource_MLIST, Release Notes)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-15836?
- CVE-2018-15836 is a high-severity vulnerability in Xelerance Openswan, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2018-09-26.
- How severe is CVE-2018-15836?
- High severity. CVSS v3 base score is 7.5 out of 10.