CVE-2022-4450 – openssl-src

Package

Manager: cargo
Name: openssl-src
Vulnerable Version: >=0 <111.25.0 || >=300.0.0 <300.0.12

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: 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

EPSS: 0.00116 pctl0.31092

Details

openssl-src contains Double free after calling `PEM_read_bio_ex` The function `PEM_read_bio_ex()` reads a PEM file from a BIO and parses and decodes the "name" (e.g. "CERTIFICATE"), any header data and the payload data. If the function succeeds then the "name_out", "header" and "data" arguments are populated with pointers to buffers containing the relevant decoded data. The caller is responsible for freeing those buffers. It is possible to construct a PEM file that results in 0 bytes of payload data. In this case `PEM_read_bio_ex()` will return a failure code but will populate the header argument with a pointer to a buffer that has already been freed. If the caller also frees this buffer then a double free will occur. This will most likely lead to a crash. This could be exploited by an attacker who has the ability to supply malicious PEM files for parsing to achieve a denial of service attack. The functions `PEM_read_bio()` and `PEM_read()` are simple wrappers around `PEM_read_bio_ex()` and therefore these functions are also directly affected. These functions are also called indirectly by a number of other OpenSSL functions including `PEM_X509_INFO_read_bio_ex()` and `SSL_CTX_use_serverinfo_file()` which are also vulnerable. Some OpenSSL internal uses of these functions are not vulnerable because the caller does not free the header argument if `PEM_read_bio_ex()` returns a failure code. These locations include the `PEM_read_bio_TYPE()` functions as well as the decoders introduced in OpenSSL 3.0.

Metadata

Created: 2023-02-08T22:22:58Z
Modified: 2025-02-13T18:36:45Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/02/GHSA-v5w6-wcm8-jm4q/GHSA-v5w6-wcm8-jm4q.json
CWE IDs: ["CWE-415"]
Alternative ID: GHSA-v5w6-wcm8-jm4q
Finding: F138
Auto approve: 1