High severity7.5OSV Advisory· Published Sep 26, 2018· Updated Jun 17, 2026
CVE-2018-15836
CVE-2018-15836
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.
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Affected products
2Patches
Vulnerability mechanics
References
3- github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf06065ef51nvdPatchVendor Advisory
- github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf857a3dnvdPatchVendor Advisory
- lists.openswan.org/pipermail/users/2018-August/023761.htmlnvdRelease NotesVendor Advisory
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