Ubuntu.comUB:CVE-2018-15836CVE-2018-15836
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.004 Low
EPSS
Percentile
72.5%
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
github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf06065ef51
launchpad.net/bugs/cve/CVE-2018-15836
lists.openswan.org/pipermail/users/2018-August/023761.html
nvd.nist.gov/vuln/detail/CVE-2018-15836
security-tracker.debian.org/tracker/CVE-2018-15836
www.cve.org/CVERecord?id=CVE-2018-15836
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.004 Low
EPSS
Percentile
72.5%