CVE-2024-6119: Possible denial of service in X.509 name checks
First published: Tue Aug 20 2024(Updated: )
Abnormal termination of an application can a cause a denial of service. Applications performing certificate name checks (e.g., TLS clients checking server certificates) may attempt to read an invalid memory address when comparing the expected name with an otherName subject alternative name of an X.509 certificate. This may result in an exception that terminates the application program. Note that basic certificate chain validation (signatures, dates, ...) is not affected, the denial of service can occur only when the application also specifies an expected DNS name, Email address or IP address. TLS servers rarely solicit client certificates, and even when they do, they generally don't perform a name check against a "reference identifier" (expected identity), but rather extract the presented identity after checking the certificate chain. So TLS servers are generally not affected and the severity of the issue is Moderate. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.1.1 and 1.0.2 are also not affected by this issue. OpenSSL 3.3, 3.2, 3.1 and 3.0 are vulnerable to this issue. OpenSSL 3.3 users should upgrade to OpenSSL 3.3.2 OpenSSL 3.2 users should upgrade to OpenSSL 3.2.3 OpenSSL 3.1 users should upgrade to OpenSSL 3.1.7 OpenSSL 3.0 users should upgrade to OpenSSL 3.0.15
Credit: openssl-security@openssl.org openssl-security@openssl.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/openssl | <=3.0.14-1~deb12u1 | 1.1.1w-0+deb11u1 1.1.1n-0+deb11u5 3.0.14-1~deb12u2 3.3.2-1 |
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Reference Links
- https://github.com/openssl/openssl/commit/05f360d9e849a1b277db628f1f13083a7f8dd04f
- https://github.com/openssl/openssl/commit/06d1dc3fa96a2ba5a3e22735a033012aadc9f0d6
- https://github.com/openssl/openssl/commit/621f3729831b05ee828a3203eddb621d014ff2b2
- https://github.com/openssl/openssl/commit/7dfcee2cd2a63b2c64b9b4b0850be64cb695b0a0
- https://openssl-library.org/news/secadv/20240903.txt
- https://security-tracker.debian.org/tracker/CVE-2024-6119
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-6119
- https://nvd.nist.gov/vuln/detail/CVE-2024-6119
- https://launchpad.net/bugs/cve/CVE-2024-6119
- https://ubuntu.com/security/CVE-2024-6119
- https://access.redhat.com/errata/RHSA-2024:6783
- https://access.redhat.com/errata/RHSA-2024:7599
- https://access.redhat.com/errata/RHSA-2024:8935
- https://access.redhat.com/errata/RHSA-2024:10818
- https://bugzilla.redhat.com/show_bug.cgi?id=2306158
- https://www.ibm.com/support/pages/node/7182403 (Advisory)
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