SB2018053022 - Memory corruption in strongswan (Alpine package)

Description

This security bulletin contains information about 1 vulnerability.

1) Memory corruption (CVE-ID: CVE-2018-10811)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in the Internet Key Exchange Version 2 (IKEv2) key derivation of strongSwan due to insufficient initialization of the variable that stores the SKEYSEED for IKEv2 key derivation before using the negotiated pseudorandom function (PRF). A remote attacker can trigger a key derivation failure and cause the affected software to clear the uninitialized memory that may lead to crash.

Remediation

Install update from vendor's website.

References

• https://git.alpinelinux.org/aports/commit/?id=142cd0660c759d91ccdd0b6b6fd5f4959413ed93
• https://git.alpinelinux.org/aports/commit/?id=69cb3c4ebb573f4427b512a8f3ce9f8da6edc356
• https://git.alpinelinux.org/aports/commit/?id=f48354faeaa48613ec150ba912a378e92d8fd969