Vulnerability Monitor

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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.

Published

2018-09-26T21:29:00.913

Last Modified

2024-11-21T03:51:32.187

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-347

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	xelerance	openswan	< 2.6.50.1	Yes

References

https://github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf06065ef51 Patch, Vendor Advisory ([email protected])
https://github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf857a3d Patch, Vendor Advisory ([email protected])
https://lists.openswan.org/pipermail/users/2018-August/023761.html Release Notes, Vendor Advisory ([email protected])
https://github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf06065ef51 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf857a3d Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.openswan.org/pipermail/users/2018-August/023761.html Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)