Bug 1946680 (CVE-2021-30004)
| Summary: | CVE-2021-30004 wpa_supplicant: mishandled AlgorithmIdentifier parameters may lead to forging attacks | ||
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| Product: | [Other] Security Response | Reporter: | Guilherme de Almeida Suckevicz <gsuckevi> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED NOTABUG | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | bgalvani, blueowl, dcaratti, dcbw, linville, lkundrak, negativo17, sukulkar |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | wpa_supplicant 2.10 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in wpa_supplicant, in the way it handled digest algorithm parameters when validating a signature. This flaw could be exploited to perform potential forging attacks. The highest threat from this vulnerability is to data integrity.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-04-09 11:35:09 UTC | 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: | 1947676, 1947677 | ||
| Bug Blocks: | 1946681 | ||
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Description
Guilherme de Almeida Suckevicz
2021-04-06 16:31:49 UTC
Statement: This issue only affects the "internal" TLS implementation. The versions of `wpa_supplicant` as shipped with Red Hat Enterprise Linux 6, 7, and 8 are not affected by this flaw, as they use the OpenSSL implementation by default. More specifically, the `CONFIG_TLS=internal` flag is not set at compile time. In reply to comment #2: > More specifically, the `CONFIG_TLS=internal` flag is not set at > compile time. CONFIG_TLS is not set in the build time configuration file: # Select TLS implementation # openssl = OpenSSL (default) # gnutls = GnuTLS # internal = Internal TLSv1 implementation (experimental) # linux = Linux kernel AF_ALG and internal TLSv1 implementation (experimental) # none = Empty template #CONFIG_TLS=openssl This is an excerpt of the Makefile: ifndef CONFIG_TLS CONFIG_TLS=openssl endif ... ifeq ($(CONFIG_TLS), internal) ... OBJS += ../src/tls/x509v3.o OBJS += ../src/tls/pkcs1.o ... As can be seen, the affected object files are included if CONFIG_TLS=internal, but CONFIG_TLS is set to openssl a few lines above. This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-30004 |