| Summary: | CVE-2016-2053 kernel: Kernel panic and system lockup by triggering BUG_ON() in public_key_verify_signature() | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Adam Mariš <amaris> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | aquini, bhu, dhoward, dhowells, fhrbata, iboverma, jkacur, joelsmith, jross, kernel-mgr, kstutsma, lgoncalv, loehr, mcressma, nmurray, rvrbovsk, security-response-team, slawomir, slong, williams, wmealing |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: |
A syntax vulnerability was discovered in the kernel's ASN1.1 DER decoder, which could lead to memory corruption or a complete local denial of service through x509 certificate DER files. A local system user could use a specially created key file to trigger BUG_ON() in the public_key_verify_signature() function (crypto/asymmetric_keys/public_key.c), to cause a kernel panic and crash the system.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-10-21 00:49:34 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Bug Depends On: | 1250405, 1302162, 1302163, 1303981 | ||
| Bug Blocks: | 1300260 | ||
Acknowledgments: Name: Philip Pettersson (Samsung) Statement: This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4, 5 and 6. This issue affects the Linux kernels as shipped with Red Hat Enterprise Linux 7, MRG and realtime kernels. Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1302163] Is there an upstream discussion on this bug? Do we have an appropriately doctored X.509 cert available? This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html |
An issue with ASN1.1 DER decoder was reported that a specially created key file could lead to a local denial of service (kernel panic) via x509 certificate DER files. This is caused by triggering a BUG_ON() in public_key_verify_signature() in crypto/asymmetric_keys/public_key.c which causes a kernel panic and system lockup on RHEL kernels. Vulnerable code: ... int public_key_verify_signature(const struct public_key *pk, const struct public_key_signature *sig) { const struct public_key_algorithm *algo; BUG_ON(!pk); BUG_ON(!pk->mpi[0]); ... Additional references: http://seclists.org/oss-sec/2016/q1/197 Introduced in commit: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=42d5ec27f873c654a68f7f865dcd7737513e9508 Fixed in commit: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d62e9dd6da45bbf0f33a8617afc5fe774c8f45f