Package: release.debian.org Severity: normal User: [email protected] Usertags: unblock
Please unblock package rsync There is a grave bug #924509 reported against rsync, due to some CVEs from 2016 on the zlib code that haven't been patched yet. This version only adds the patches from those 4 CVEs. Thanks! unblock rsync/3.1.3-5 -- System Information: Debian Release: buster/sid APT prefers unstable APT policy: (500, 'unstable'), (500, 'stable'), (500, 'oldstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.17.6-wurtel-ws (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Init: sysvinit (via /sbin/init)
diff -Nru rsync-3.1.3/debian/changelog rsync-3.1.3/debian/changelog --- rsync-3.1.3/debian/changelog 2019-01-26 13:05:25.000000000 +0100 +++ rsync-3.1.3/debian/changelog 2019-03-15 11:25:01.000000000 +0100 @@ -1,3 +1,10 @@ +rsync (3.1.3-6) unstable; urgency=medium + + * Apply CVEs from 2016 to the zlib code. + closes:#924509 + + -- Paul Slootman <[email protected]> Fri, 15 Mar 2019 11:25:01 +0100 + rsync (3.1.3-5) unstable; urgency=medium * d/rules: fix sorting for reproducible builds, in the previous release diff -Nru rsync-3.1.3/debian/patches/CVE-2016-9840.patch rsync-3.1.3/debian/patches/CVE-2016-9840.patch --- rsync-3.1.3/debian/patches/CVE-2016-9840.patch 1970-01-01 01:00:00.000000000 +0100 +++ rsync-3.1.3/debian/patches/CVE-2016-9840.patch 2019-03-15 11:25:01.000000000 +0100 @@ -0,0 +1,71 @@ +>From 6a043145ca6e9c55184013841a67b2fef87e44c0 Mon Sep 17 00:00:00 2001 +From: Mark Adler <[email protected]> +Date: Wed, 21 Sep 2016 23:35:50 -0700 +Subject: [PATCH] Remove offset pointer optimization in inftrees.c. + +inftrees.c was subtracting an offset from a pointer to an array, +in order to provide a pointer that allowed indexing starting at +the offset. This is not compliant with the C standard, for which +the behavior of a pointer decremented before its allocated memory +is undefined. Per the recommendation of a security audit of the +zlib code by Trail of Bits and TrustInSoft, in support of the +Mozilla Foundation, this tiny optimization was removed, in order +to avoid the possibility of undefined behavior. +--- + inftrees.c | 18 ++++++++---------- + 1 file changed, 8 insertions(+), 10 deletions(-) + +diff --git a/zlib/inftrees.c b/zlib/inftrees.c +index 22fcd666..0d2670d5 100644 +--- a/zlib/inftrees.c ++++ b/zlib/inftrees.c +@@ -54,7 +54,7 @@ unsigned short FAR *work; + code FAR *next; /* next available space in table */ + const unsigned short FAR *base; /* base value table to use */ + const unsigned short FAR *extra; /* extra bits table to use */ +- int end; /* use base and extra for symbol > end */ ++ unsigned match; /* use base and extra for symbol >= match */ + unsigned short count[MAXBITS+1]; /* number of codes of each length */ + unsigned short offs[MAXBITS+1]; /* offsets in table for each length */ + static const unsigned short lbase[31] = { /* Length codes 257..285 base */ +@@ -181,19 +181,17 @@ unsigned short FAR *work; + switch (type) { + case CODES: + base = extra = work; /* dummy value--not used */ +- end = 19; ++ match = 20; + break; + case LENS: + base = lbase; +- base -= 257; + extra = lext; +- extra -= 257; +- end = 256; ++ match = 257; + break; + default: /* DISTS */ + base = dbase; + extra = dext; +- end = -1; ++ match = 0; + } + + /* initialize state for loop */ +@@ -216,13 +214,13 @@ unsigned short FAR *work; + for (;;) { + /* create table entry */ + here.bits = (unsigned char)(len - drop); +- if ((int)(work[sym]) < end) { ++ if (work[sym] + 1 < match) { + here.op = (unsigned char)0; + here.val = work[sym]; + } +- else if ((int)(work[sym]) > end) { +- here.op = (unsigned char)(extra[work[sym]]); +- here.val = base[work[sym]]; ++ else if (work[sym] >= match) { ++ here.op = (unsigned char)(extra[work[sym] - match]); ++ here.val = base[work[sym] - match]; + } + else { + here.op = (unsigned char)(32 + 64); /* end of block */ diff -Nru rsync-3.1.3/debian/patches/CVE-2016-9841.patch rsync-3.1.3/debian/patches/CVE-2016-9841.patch --- rsync-3.1.3/debian/patches/CVE-2016-9841.patch 1970-01-01 01:00:00.000000000 +0100 +++ rsync-3.1.3/debian/patches/CVE-2016-9841.patch 2019-03-15 11:25:01.000000000 +0100 @@ -0,0 +1,224 @@ +>From 9aaec95e82117c1cb0f9624264c3618fc380cecb Mon Sep 17 00:00:00 2001 +From: Mark Adler <[email protected]> +Date: Wed, 21 Sep 2016 22:25:21 -0700 +Subject: [PATCH] Use post-increment only in inffast.c. + +An old inffast.c optimization turns out to not be optimal anymore +with modern compilers, and furthermore was not compliant with the +C standard, for which decrementing a pointer before its allocated +memory is undefined. Per the recommendation of a security audit of +the zlib code by Trail of Bits and TrustInSoft, in support of the +Mozilla Foundation, this "optimization" was removed, in order to +avoid the possibility of undefined behavior. +--- + inffast.c | 81 +++++++++++++++++++++---------------------------------- + 1 file changed, 31 insertions(+), 50 deletions(-) + +diff --git a/zlib/inffast.c b/zlib/inffast.c +index bda59ceb..f0d163db 100644 +--- a/zlib/inffast.c ++++ b/zlib/inffast.c +@@ -10,25 +10,6 @@ + + #ifndef ASMINF + +-/* Allow machine dependent optimization for post-increment or pre-increment. +- Based on testing to date, +- Pre-increment preferred for: +- - PowerPC G3 (Adler) +- - MIPS R5000 (Randers-Pehrson) +- Post-increment preferred for: +- - none +- No measurable difference: +- - Pentium III (Anderson) +- - M68060 (Nikl) +- */ +-#ifdef POSTINC +-# define OFF 0 +-# define PUP(a) *(a)++ +-#else +-# define OFF 1 +-# define PUP(a) *++(a) +-#endif +- + /* + Decode literal, length, and distance codes and write out the resulting + literal and match bytes until either not enough input or output is +@@ -96,9 +77,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + + /* copy state to local variables */ + state = (struct inflate_state FAR *)strm->state; +- in = strm->next_in - OFF; ++ in = strm->next_in; + last = in + (strm->avail_in - 5); +- out = strm->next_out - OFF; ++ out = strm->next_out; + beg = out - (start - strm->avail_out); + end = out + (strm->avail_out - 257); + #ifdef INFLATE_STRICT +@@ -119,9 +100,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + input data or output space */ + do { + if (bits < 15) { +- hold += (unsigned long)(PUP(in)) << bits; ++ hold += (unsigned long)(*in++) << bits; + bits += 8; +- hold += (unsigned long)(PUP(in)) << bits; ++ hold += (unsigned long)(*in++) << bits; + bits += 8; + } + here = lcode[hold & lmask]; +@@ -134,14 +115,14 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ? + "inflate: literal '%c'\n" : + "inflate: literal 0x%02x\n", here.val)); +- PUP(out) = (unsigned char)(here.val); ++ *out++ = (unsigned char)(here.val); + } + else if (op & 16) { /* length base */ + len = (unsigned)(here.val); + op &= 15; /* number of extra bits */ + if (op) { + if (bits < op) { +- hold += (unsigned long)(PUP(in)) << bits; ++ hold += (unsigned long)(*in++) << bits; + bits += 8; + } + len += (unsigned)hold & ((1U << op) - 1); +@@ -150,9 +131,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + } + Tracevv((stderr, "inflate: length %u\n", len)); + if (bits < 15) { +- hold += (unsigned long)(PUP(in)) << bits; ++ hold += (unsigned long)(*in++) << bits; + bits += 8; +- hold += (unsigned long)(PUP(in)) << bits; ++ hold += (unsigned long)(*in++) << bits; + bits += 8; + } + here = dcode[hold & dmask]; +@@ -165,10 +146,10 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + dist = (unsigned)(here.val); + op &= 15; /* number of extra bits */ + if (bits < op) { +- hold += (unsigned long)(PUP(in)) << bits; ++ hold += (unsigned long)(*in++) << bits; + bits += 8; + if (bits < op) { +- hold += (unsigned long)(PUP(in)) << bits; ++ hold += (unsigned long)(*in++) << bits; + bits += 8; + } + } +@@ -196,30 +177,30 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + #ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR + if (len <= op - whave) { + do { +- PUP(out) = 0; ++ *out++ = 0; + } while (--len); + continue; + } + len -= op - whave; + do { +- PUP(out) = 0; ++ *out++ = 0; + } while (--op > whave); + if (op == 0) { + from = out - dist; + do { +- PUP(out) = PUP(from); ++ *out++ = *from++; + } while (--len); + continue; + } + #endif + } +- from = window - OFF; ++ from = window; + if (wnext == 0) { /* very common case */ + from += wsize - op; + if (op < len) { /* some from window */ + len -= op; + do { +- PUP(out) = PUP(from); ++ *out++ = *from++; + } while (--op); + from = out - dist; /* rest from output */ + } +@@ -230,14 +211,14 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + if (op < len) { /* some from end of window */ + len -= op; + do { +- PUP(out) = PUP(from); ++ *out++ = *from++; + } while (--op); +- from = window - OFF; ++ from = window; + if (wnext < len) { /* some from start of window */ + op = wnext; + len -= op; + do { +- PUP(out) = PUP(from); ++ *out++ = *from++; + } while (--op); + from = out - dist; /* rest from output */ + } +@@ -248,35 +229,35 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + if (op < len) { /* some from window */ + len -= op; + do { +- PUP(out) = PUP(from); ++ *out++ = *from++; + } while (--op); + from = out - dist; /* rest from output */ + } + } + while (len > 2) { +- PUP(out) = PUP(from); +- PUP(out) = PUP(from); +- PUP(out) = PUP(from); ++ *out++ = *from++; ++ *out++ = *from++; ++ *out++ = *from++; + len -= 3; + } + if (len) { +- PUP(out) = PUP(from); ++ *out++ = *from++; + if (len > 1) +- PUP(out) = PUP(from); ++ *out++ = *from++; + } + } + else { + from = out - dist; /* copy direct from output */ + do { /* minimum length is three */ +- PUP(out) = PUP(from); +- PUP(out) = PUP(from); +- PUP(out) = PUP(from); ++ *out++ = *from++; ++ *out++ = *from++; ++ *out++ = *from++; + len -= 3; + } while (len > 2); + if (len) { +- PUP(out) = PUP(from); ++ *out++ = *from++; + if (len > 1) +- PUP(out) = PUP(from); ++ *out++ = *from++; + } + } + } +@@ -313,8 +294,8 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ + hold &= (1U << bits) - 1; + + /* update state and return */ +- strm->next_in = in + OFF; +- strm->next_out = out + OFF; ++ strm->next_in = in; ++ strm->next_out = out; + strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last)); + strm->avail_out = (unsigned)(out < end ? + 257 + (end - out) : 257 - (out - end)); diff -Nru rsync-3.1.3/debian/patches/CVE-2016-9842.patch rsync-3.1.3/debian/patches/CVE-2016-9842.patch --- rsync-3.1.3/debian/patches/CVE-2016-9842.patch 1970-01-01 01:00:00.000000000 +0100 +++ rsync-3.1.3/debian/patches/CVE-2016-9842.patch 2019-03-15 11:25:01.000000000 +0100 @@ -0,0 +1,29 @@ +>From e54e1299404101a5a9d0cf5e45512b543967f958 Mon Sep 17 00:00:00 2001 +From: Mark Adler <[email protected]> +Date: Sat, 5 Sep 2015 17:45:55 -0700 +Subject: [PATCH] Avoid shifts of negative values inflateMark(). + +The C standard says that bit shifts of negative integers is +undefined. This casts to unsigned values to assure a known +result. +--- + inflate.c | 5 +++-- + 1 file changed, 3 insertions(+), 2 deletions(-) + +diff --git a/zlib/inflate.c b/zlib/inflate.c +index 2889e3a0..a7184167 100644 +--- a/zlib/inflate.c ++++ b/zlib/inflate.c +@@ -1506,9 +1506,10 @@ z_streamp strm; + { + struct inflate_state FAR *state; + +- if (strm == Z_NULL || strm->state == Z_NULL) return -1L << 16; ++ if (strm == Z_NULL || strm->state == Z_NULL) ++ return (long)(((unsigned long)0 - 1) << 16); + state = (struct inflate_state FAR *)strm->state; +- return ((long)(state->back) << 16) + ++ return (long)(((unsigned long)((long)state->back)) << 16) + + (state->mode == COPY ? state->length : + (state->mode == MATCH ? state->was - state->length : 0)); + } diff -Nru rsync-3.1.3/debian/patches/CVE-2016-9843.patch rsync-3.1.3/debian/patches/CVE-2016-9843.patch --- rsync-3.1.3/debian/patches/CVE-2016-9843.patch 1970-01-01 01:00:00.000000000 +0100 +++ rsync-3.1.3/debian/patches/CVE-2016-9843.patch 2019-03-15 11:25:01.000000000 +0100 @@ -0,0 +1,49 @@ +>From d1d577490c15a0c6862473d7576352a9f18ef811 Mon Sep 17 00:00:00 2001 +From: Mark Adler <[email protected]> +Date: Wed, 28 Sep 2016 20:20:25 -0700 +Subject: [PATCH] Avoid pre-decrement of pointer in big-endian CRC calculation. + +There was a small optimization for PowerPCs to pre-increment a +pointer when accessing a word, instead of post-incrementing. This +required prefacing the loop with a decrement of the pointer, +possibly pointing before the object passed. This is not compliant +with the C standard, for which decrementing a pointer before its +allocated memory is undefined. When tested on a modern PowerPC +with a modern compiler, the optimization no longer has any effect. +Due to all that, and per the recommendation of a security audit of +the zlib code by Trail of Bits and TrustInSoft, in support of the +Mozilla Foundation, this "optimization" was removed, in order to +avoid the possibility of undefined behavior. +--- + crc32.c | 4 +--- + 1 file changed, 1 insertion(+), 3 deletions(-) + +diff --git a/zlib/crc32.c b/zlib/crc32.c +index 979a7190..05733f4e 100644 +--- a/zlib/crc32.c ++++ b/zlib/crc32.c +@@ -278,7 +278,7 @@ local unsigned long crc32_little(crc, buf, len) + } + + /* ========================================================================= */ +-#define DOBIG4 c ^= *++buf4; \ ++#define DOBIG4 c ^= *buf4++; \ + c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \ + crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24] + #define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4 +@@ -300,7 +300,6 @@ local unsigned long crc32_big(crc, buf, len) + } + + buf4 = (const z_crc_t FAR *)(const void FAR *)buf; +- buf4--; + while (len >= 32) { + DOBIG32; + len -= 32; +@@ -309,7 +308,6 @@ local unsigned long crc32_big(crc, buf, len) + DOBIG4; + len -= 4; + } +- buf4++; + buf = (const unsigned char FAR *)buf4; + + if (len) do {
