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36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
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This patch prevents a code execution vector involving terminal escape
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sequences when rxvt-unicode is in "secure mode".
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This change was spurred by the following conversation on the
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oss-security mailing list:
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Problem description and proof of concept:
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http://seclists.org/oss-sec/2017/q2/190
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Upstream response:
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http://seclists.org/oss-sec/2017/q2/291
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Patch copied from upstream source repository:
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http://cvs.schmorp.de/rxvt-unicode/src/command.C?r1=1.582&r2=1.583
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--- rxvt-unicode/src/command.C 2016/07/14 05:33:26 1.582
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+++ rxvt-unicode/src/command.C 2017/05/18 02:43:18 1.583
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@@ -2695,7 +2695,7 @@
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/* kidnapped escape sequence: Should be 8.3.48 */
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case C1_ESA: /* ESC G */
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// used by original rxvt for rob nations own graphics mode
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- if (cmd_getc () == 'Q')
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+ if (cmd_getc () == 'Q' && option (Opt_insecure))
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tt_printf ("\033G0\012"); /* query graphics - no graphics */
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break;
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@@ -2914,7 +2914,7 @@
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break;
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case CSI_CUB: /* 8.3.18: (1) CURSOR LEFT */
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- case CSI_HPB: /* 8.3.59: (1) CHARACTER POSITION BACKWARD */
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+ case CSI_HPB: /* 8.3.59: (1) CHARACTER POSITION BACKWARD */
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#ifdef ISO6429
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arg[0] = -arg[0];
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#else /* emulate common DEC VTs */
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