0018-Fix-CVE-2014-9913-buffer-overflow-in-unzip.patch (1457B)
1 From 27b0cd89656d39266da7dcab7eb1812dcfc34192 Mon Sep 17 00:00:00 2001 2 From: "Steven M. Schweda" <sms@antinode.info> 3 Date: Sat, 15 Jun 2019 18:13:11 -0700 4 Subject: [PATCH] Fix CVE-2014-9913, buffer overflow in unzip 5 6 --- 7 list.c | 13 ++++++++++++- 8 1 file changed, 12 insertions(+), 1 deletion(-) 9 10 diff --git a/list.c b/list.c 11 index 5de41e5..e488109 100644 12 --- a/list.c 13 +++ b/list.c 14 @@ -339,7 +339,18 @@ int list_files(__G) /* return PK-type error code */ 15 G.crec.compression_method == ENHDEFLATED) { 16 methbuf[5] = dtype[(G.crec.general_purpose_bit_flag>>1) & 3]; 17 } else if (methnum >= NUM_METHODS) { 18 - sprintf(&methbuf[4], "%03u", G.crec.compression_method); 19 + /* 2013-02-26 SMS. 20 + * http://sourceforge.net/p/infozip/bugs/27/ CVE-2014-9913. 21 + * Unexpectedly large compression methods overflow 22 + * &methbuf[]. Use the old, three-digit decimal format 23 + * for values which fit. Otherwise, sacrifice the 24 + * colon, and use four-digit hexadecimal. 25 + */ 26 + if (G.crec.compression_method <= 999) { 27 + sprintf( &methbuf[ 4], "%03u", G.crec.compression_method); 28 + } else { 29 + sprintf( &methbuf[ 3], "%04X", G.crec.compression_method); 30 + } 31 } 32 33 #if 0 /* GRR/Euro: add this? */ 34 -- 35 2.20.1 36