Bug 1939157 (CVE-2021-20304)
| Summary: | CVE-2021-20304 OpenEXR: Undefined-shift in Imf_2_5::hufDecode | ||
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| Product: | [Other] Security Response | Reporter: | Michael Kaplan <mkaplan> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED WONTFIX | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | jeischma, jridky, kwizart, rdieter, rh-spice-bugs |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | OpenEXR 3.0.0-beta | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in OpenEXR's hufDecode functionality. This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error. The highest threat from this vulnerability is to system availability.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-11-02 23:21:02 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: | 1939188, 1944917, 1944918, 1944919, 1944920 | ||
| Bug Blocks: | 1929339 | ||
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Description
Michael Kaplan
2021-03-15 17:27:24 UTC
External References: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26229 Created OpenEXR tracking bugs for this issue: Affects: fedora-all [bug 1939188] Upstream patch: https://github.com/AcademySoftwareFoundation/openexr/commit/51a92d67f53c08230734e74564c807043cbfe41e Flaw summary: In hufDecode of IlmImf/ImfHuf.cpp, if lc < 0, the getCode macro function could perform an undefined bitwise right shift with unintended consequences upon execution of `unsigned char cs = (c >> lc);` lc is controllable via the input buffer. This could potentially lead to an impact on application availability when OpenEXR processes a crafted input file. |