CVE-2018-15836
HIGHOpenswan < 2.6.50.1 - Improper Verification of Cryptographic Signature in PKCS#1 v1.5 RSA Implementation
Title source: llmDescription
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.
References (3)
Core 3
Core References
Release Notes, Vendor Advisory mailing-list
x_refsource_mlist
https://lists.openswan.org/pipermail/users/2018-August/023761.html
Patch, Vendor Advisory x_refsource_confirm
https://github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf857a3d
Patch, Vendor Advisory x_refsource_confirm
https://github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf06065ef51
Scores
CVSS v3
7.5
EPSS
0.0149
EPSS Percentile
70.8%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
CWE
CWE-347
Status
published
Products (1)
xelerance/openswan
< 2.6.50.1
Published
Sep 26, 2018
Tracked Since
Feb 18, 2026