Bug 1190709 (CVE-2015-1547)
| Summary: | CVE-2015-1547 libtiff: use of uninitialized memory in NeXTDecode | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Vasyl Kaigorodov <vkaigoro> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | erik-fedora, mhradile, phracek, sardella, security-response-team, sisharma, slawomir |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-06-08 02:38:46 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: | 1190710, 1190712, 1299918, 1299919, 1299920, 1299921, 1335098, 1335099 | ||
| Bug Blocks: | 1174883 | ||
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Description
Vasyl Kaigorodov
2015-02-09 14:07:20 UTC
Created libtiff tracking bugs for this issue: Affects: fedora-all [bug 1190710] Created mingw-libtiff tracking bugs for this issue: Affects: epel-7 [bug 1190712] Patch ===== There is no proper information of fixing this flaw anywhere according to http://seclists.org/oss-sec/2015/q1/454 - uninitialized memory in NeXTDecode Fixed in: 2014-12-29 Even Rouault <even.rouault () spatialys com> * libtiff/tif_next.c: add new tests to check that we don't read outside of the compressed input stream buffer. I don't think this had a CVE number assigned yet. Use CVE-2014-9655 for these two issues related to access of uninitialized memory, as demonstrated by libtiff-cvs-1.tif and libtiff-cvs-2.tif. http://lcamtuf.coredump.cx/afl/vulns/libtiff5.tif - another use of uninitialized memory in NeXTDecode after fixing the previous case. I don't think this had a CVE number assigned yet. Use CVE-2015-1547 for this issue. -------------------- Considering above part of patch that fixes CVE-2014-9655 in tif_next.c from commit https://github.com/vadz/libtiff/commit/40a5955cbf0df62b1f9e9bd7d9657b0070725d19 fixes CVE-2015-1547 libtiff/tif_next.c @@ -71,7 +71,7 @@ NeXTDecode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be read"); return (0); } - for (row = buf; occ > 0; occ -= scanline, row += scanline) { + for (row = buf; cc > 0 && occ > 0; occ -= scanline, row += scanline) { n = *bp++, cc--; switch (n) { case LITERALROW: @@ -90,6 +90,8 @@ NeXTDecode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) * The scanline has a literal span that begins at some * offset. */ + if( cc < 4 ) + goto bad; off = (bp[0] * 256) + bp[1]; n = (bp[2] * 256) + bp[3]; if (cc < 4+n || off+n > scanline) libtiff-4.0.3-20.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report. Statement: Red Hat Product Security has rated this issue as having moderate security impact, a future update may address this flaw in libtiff. This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2016:1547 https://rhn.redhat.com/errata/RHSA-2016-1547.html This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2016:1546 https://rhn.redhat.com/errata/RHSA-2016-1546.html |