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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...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2018-0487
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1544729 1544730
Blocks:
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
Clone Of:
Environment:
Last Closed: 2019-06-08 03:39:48 UTC
Embargoed:


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

Reference:

https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-01

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.


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