RUSTSEC-2021-0055

    Dashboard / Vulnerabilities / RUSTSEC-2021-0055

    RUSTSEC-2021-0055

    Published: 1 May 2021Last Modified: 16 Dec 2024

    Summary: NULL pointer deref in signature_algorithms processing

    Details: An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue.

    References: https://crates.io/crates/openssl-src, https://rustsec.org/advisories/RUSTSEC-2021-0055.html, https://www.openssl.org/news/secadv/20210325.txt

    Affected packages

    Package

    Name: openssl-src

    Purl: pkg:cargo/openssl-src

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0.0.0-0
    Fixed -111.15.0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    RUSTSEC-2021-0055 | CVE-DB