Bug 1544728 (CVE-2018-0487) - CVE-2018-0487 mbedtls: Risk of remote code execution when verifying RSASSA-PSS signatures
Summary: CVE-2018-0487 mbedtls: Risk of remote code execution when verifying RSASSA-PS...
Alias: CVE-2018-0487
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1544729 1544730
TreeView+ depends on / blocked
Reported: 2018-02-13 11:56 UTC by Adam Mariš
Modified: 2019-09-29 14:32 UTC (History)
2 users (show)

Fixed In Version: mbedtls 1.3.22, mbedtls 2.1.10, mbedtls 2.7.0
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2019-06-08 03:39:48 UTC

Attachments (Terms of Use)

Description Adam Mariš 2018-02-13 11:56:22 UTC
When RSASSA-PSS signature verification is enabled, sending a maliciously constructed certificate chain can be used to cause a buffer overflow on the peer's stack, potentially leading to crash or remote code execution. This can be triggered remotely from either side in both TLS and DTLS.

RSASSA-PSS is the part of PKCS #1 v2.1 standard and can be enabled by the compile time option MBEDTLS_PKCS1_V21 in config.h. If MBEDTLS_PKCS1_V21 is disabled when compiling the library, then the vulnerability is not present. RSASSA-PSS signatures are enabled in the default configuration.

Affected versions: all versions of Mbed TLS from version 1.3.8 and up, including all 2.1 and later releases



Comment 1 Adam Mariš 2018-02-13 11:56:57 UTC
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 1544730]
Affects: fedora-all [bug 1544729]

Comment 2 Product Security DevOps Team 2019-06-08 03:39:48 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

Note You need to log in before you can comment on or make changes to this bug.