Bug 2294682 (CVE-2024-5642)
| Summary: | CVE-2024-5642 python: Invalid value for OpenSSL API may cause Buffer over-read when NPN is used | ||
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| Product: | [Other] Security Response | Reporter: | Patrick Del Bello <pdelbell> |
| Component: | vulnerability | Assignee: | Product Security <prodsec-ir-bot> |
| Status: | NEW --- | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | agarcial, aoconnor, aprice, asegurap, bdettelb, caswilli, dfreiber, drow, jburrell, jmitchel, jsamir, jsherril, jtanner, kaycoth, kholdawa, kshier, mpierce, orabin, psegedy, sthirugn, vkrizan, vkumar, xiaoxwan, zzhou |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A vulnerability was found in Python/CPython that does not disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols(), which is an invalid value for the underlying OpenSSL API. This issue results in a buffer over-read when NPN is used. See CVE -2024-5535 for OpenSSL for more information.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2294685, 2294686, 2294687, 2294688, 2294689, 2294683, 2294684 | ||
| Bug Blocks: | 2294681 | ||
Created mingw-python3 tracking bugs for this issue: Affects: fedora-all [bug 2294684] Created python2.7 tracking bugs for this issue: Affects: fedora-all [bug 2294685] Created python3.6 tracking bugs for this issue: Affects: fedora-all [bug 2294686] Created python3.7 tracking bugs for this issue: Affects: fedora-all [bug 2294687] Created python3.8 tracking bugs for this issue: Affects: fedora-all [bug 2294688] Created python3.9 tracking bugs for this issue: Affects: fedora-all [bug 2294689] Created python34 tracking bugs for this issue: Affects: epel-all [bug 2294683] |
CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured). https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e https://github.com/python/cpython/pull/23014 https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/