DEBIAN-CVE-2022-4450
- Source
- https://security-tracker.debian.org/tracker/CVE-2022-4450
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-4450.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2022-4450
- Upstream
- Downstream
- Published
- 2023-02-08T20:15:23Z
- Modified
- 2026-09-01T20:04:49Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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. The OpenSSL asn1parse command line application is also impacted by this issue.
- References
Affected packages
Debian:12 / openssl
Package
- Name
- openssl
- Purl
- pkg:deb/debian/openssl?arch=source&distro=bookworm
Debian:13 / openssl
Package
- Name
- openssl
- Purl
- pkg:deb/debian/openssl?arch=source&distro=trixie
Debian:14 / openssl
Package
- Name
- openssl
- Purl
- pkg:deb/debian/openssl?arch=source&distro=forky