Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xelerance | Openswan | < 2.6.50.1 |
Related Weaknesses (CWE)
References
- https://github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf0606PatchVendor Advisory
- https://github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf8PatchVendor Advisory
- https://lists.openswan.org/pipermail/users/2018-August/023761.htmlRelease NotesVendor Advisory
- https://github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf0606PatchVendor Advisory
- https://github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf8PatchVendor Advisory
- https://lists.openswan.org/pipermail/users/2018-August/023761.htmlRelease NotesVendor Advisory
FAQ
What is CVE-2018-15836?
CVE-2018-15836 is a vulnerability with a CVSS score of 7.5 (HIGH). 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. Conseq...
How severe is CVE-2018-15836?
CVE-2018-15836 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-15836?
Check the references section above for vendor advisories and patch information. Affected products include: Xelerance Openswan.