| Summary: | CVE-2017-7467 minicom: Out of bounds write in vt100.c | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Adam Mariš <amaris> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED WONTFIX | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | carnil, dkholia, msehnout, olysonek, security-response-team |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | minicom 2.7.1 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A buffer overflow flaw was found in the way minicom handled VT100 escape sequences. A malicious terminal device could potentially use this flaw to crash minicom, or execute arbitrary code in the context of the minicom process.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-04-20 04:42:16 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: | 1443129 | ||
| Bug Blocks: | 1442106 | ||
Acknowledgments: Name: Alexander Peslyak (Openwall) Created minicom tracking bugs for this issue: Affects: fedora-all [bug 1443129] |
A potentially exploitable out of bounds write vulnerability in vt100.c was found. Vulnerable code: static void (*vt_keyb)(int, int);/* Gets called for NORMAL/APPL switch. */ static void (*termout)(const char *, int);/* Gets called to output a string. */ static int escparms[8]; /* Cumulated escape sequence. */ static int ptr; /* Index into escparms array. */ static long vt_tabs[5]; /* Tab stops for max. 32*5 = 160 columns. */ //... /* See if a number follows */ if (c >= '0' && c <= '9') { escparms[ptr] = 10*escparms[ptr] + c - '0'; return; } /* Separation between numbers ? */ if (c == ';') { if (ptr < 15) ptr++; return; } With crafted input, attacker can write out of bounds of escparms array and could potentially overwrite ptr pointer.