From: Archana Polampalli <archana.polampa...@windriver.com> A heap-based buffer overflow flaw was found in the rsync daemon. This issue is due to improper handling of attacker-controlled checksum lengths (s2length) in the code. When MAX_DIGEST_LEN exceeds the fixed SUM_LENGTH (16 bytes), an attacker can write out of bounds in the sum2 buffer.
Signed-off-by: Archana Polampalli <archana.polampa...@windriver.com> --- .../rsync/files/CVE-2024-12084-0001.patch | 156 ++++++++++++++++++ .../rsync/files/CVE-2024-12084-0002.patch | 43 +++++ meta/recipes-devtools/rsync/rsync_3.2.7.bb | 2 + 3 files changed, 201 insertions(+) create mode 100644 meta/recipes-devtools/rsync/files/CVE-2024-12084-0001.patch create mode 100644 meta/recipes-devtools/rsync/files/CVE-2024-12084-0002.patch diff --git a/meta/recipes-devtools/rsync/files/CVE-2024-12084-0001.patch b/meta/recipes-devtools/rsync/files/CVE-2024-12084-0001.patch new file mode 100644 index 0000000000..d654067fab --- /dev/null +++ b/meta/recipes-devtools/rsync/files/CVE-2024-12084-0001.patch @@ -0,0 +1,156 @@ +From 0902b52f6687b1f7952422080d50b93108742e53 Mon Sep 17 00:00:00 2001 +From: Wayne Davison <wa...@opencoder.net> +Date: Tue, 29 Oct 2024 22:55:29 -0700 +Subject: [PATCH] Some checksum buffer fixes. + +- Put sum2_array into sum_struct to hold an array of sum2 checksums + that are each xfer_sum_len bytes. +- Remove sum2 buf from sum_buf. +- Add macro sum2_at() to access each sum2 array element. +- Throw an error if a sums header has an s2length larger than + xfer_sum_len. + +CVE: CVE-2024-12084 + +Upstream-Status: Backport [https://git.samba.org/?p=rsync.git;a=commit;h=0902b52f6687b1f7952422080d50b93108742e53] + +Signed-off-by: Archana Polampalli <archana.polampa...@windriver.com> +--- + io.c | 3 ++- + match.c | 8 ++++---- + rsync.c | 5 ++++- + rsync.h | 4 +++- + sender.c | 4 +++- + 5 files changed, 16 insertions(+), 8 deletions(-) + +diff --git a/io.c b/io.c +index a99ac0ec..bb60eeca 100644 +--- a/io.c ++++ b/io.c +@@ -55,6 +55,7 @@ extern int read_batch; + extern int compat_flags; + extern int protect_args; + extern int checksum_seed; ++extern int xfer_sum_len; + extern int daemon_connection; + extern int protocol_version; + extern int remove_source_files; +@@ -1977,7 +1978,7 @@ void read_sum_head(int f, struct sum_struct *sum) + exit_cleanup(RERR_PROTOCOL); + } + sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); +- if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { ++ if (sum->s2length < 0 || sum->s2length > xfer_sum_len) { + rprintf(FERROR, "Invalid checksum length %d [%s]\n", + sum->s2length, who_am_i()); + exit_cleanup(RERR_PROTOCOL); +diff --git a/match.c b/match.c +index cdb30a15..36e78ed2 100644 +--- a/match.c ++++ b/match.c +@@ -232,7 +232,7 @@ static void hash_search(int f,struct sum_struct *s, + done_csum2 = 1; + } + +- if (memcmp(sum2,s->sums[i].sum2,s->s2length) != 0) { ++ if (memcmp(sum2, sum2_at(s, i), s->s2length) != 0) { + false_alarms++; + continue; + } +@@ -252,7 +252,7 @@ static void hash_search(int f,struct sum_struct *s, + if (i != aligned_i) { + if (sum != s->sums[aligned_i].sum1 + || l != s->sums[aligned_i].len +- || memcmp(sum2, s->sums[aligned_i].sum2, s->s2length) != 0) ++ || memcmp(sum2, sum2_at(s, aligned_i), s->s2length) != 0) + goto check_want_i; + i = aligned_i; + } +@@ -271,7 +271,7 @@ static void hash_search(int f,struct sum_struct *s, + if (sum != s->sums[i].sum1) + goto check_want_i; + get_checksum2((char *)map, l, sum2); +- if (memcmp(sum2, s->sums[i].sum2, s->s2length) != 0) ++ if (memcmp(sum2, sum2_at(s, i), s->s2length) != 0) + goto check_want_i; + /* OK, we have a re-alignment match. Bump the offset + * forward to the new match point. */ +@@ -290,7 +290,7 @@ static void hash_search(int f,struct sum_struct *s, + && (!updating_basis_file || s->sums[want_i].offset >= offset + || s->sums[want_i].flags & SUMFLG_SAME_OFFSET) + && sum == s->sums[want_i].sum1 +- && memcmp(sum2, s->sums[want_i].sum2, s->s2length) == 0) { ++ && memcmp(sum2, sum2_at(s, want_i), s->s2length) == 0) { + /* we've found an adjacent match - the RLL coder + * will be happy */ + i = want_i; +diff --git a/rsync.c b/rsync.c +index cd288f57..b130aba5 100644 +--- a/rsync.c ++++ b/rsync.c +@@ -437,7 +437,10 @@ int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr, cha + */ + void free_sums(struct sum_struct *s) + { +- if (s->sums) free(s->sums); ++ if (s->sums) { ++ free(s->sums); ++ free(s->sum2_array); ++ } + free(s); + } + +diff --git a/rsync.h b/rsync.h +index d3709fe0..8ddbe702 100644 +--- a/rsync.h ++++ b/rsync.h +@@ -958,12 +958,12 @@ struct sum_buf { + uint32 sum1; /**< simple checksum */ + int32 chain; /**< next hash-table collision */ + short flags; /**< flag bits */ +- char sum2[SUM_LENGTH]; /**< checksum */ + }; + + struct sum_struct { + OFF_T flength; /**< total file length */ + struct sum_buf *sums; /**< points to info for each chunk */ ++ char *sum2_array; /**< checksums of length xfer_sum_len */ + int32 count; /**< how many chunks */ + int32 blength; /**< block_length */ + int32 remainder; /**< flength % block_length */ +@@ -982,6 +982,8 @@ struct map_struct { + int status; /* first errno from read errors */ + }; + ++#define sum2_at(s, i) ((s)->sum2_array + ((OFF_T)(i) * xfer_sum_len)) ++ + #define NAME_IS_FILE (0) /* filter name as a file */ + #define NAME_IS_DIR (1<<0) /* filter name as a dir */ + #define NAME_IS_XATTR (1<<2) /* filter name as an xattr */ +diff --git a/sender.c b/sender.c +index 3d4f052e..ab205341 100644 +--- a/sender.c ++++ b/sender.c +@@ -31,6 +31,7 @@ extern int log_before_transfer; + extern int stdout_format_has_i; + extern int logfile_format_has_i; + extern int want_xattr_optim; ++extern int xfer_sum_len; + extern int csum_length; + extern int append_mode; + extern int copy_links; +@@ -94,10 +95,11 @@ static struct sum_struct *receive_sums(int f) + return(s); + + s->sums = new_array(struct sum_buf, s->count); ++ s->sum2_array = new_array(char, s->count * xfer_sum_len); + + for (i = 0; i < s->count; i++) { + s->sums[i].sum1 = read_int(f); +- read_buf(f, s->sums[i].sum2, s->s2length); ++ read_buf(f, sum2_at(s, i), s->s2length); + + s->sums[i].offset = offset; + s->sums[i].flags = 0; +-- +2.40.0 diff --git a/meta/recipes-devtools/rsync/files/CVE-2024-12084-0002.patch b/meta/recipes-devtools/rsync/files/CVE-2024-12084-0002.patch new file mode 100644 index 0000000000..266b80c241 --- /dev/null +++ b/meta/recipes-devtools/rsync/files/CVE-2024-12084-0002.patch @@ -0,0 +1,43 @@ +From 42e2b56c4ede3ab164f9a5c6dae02aa84606a6c1 Mon Sep 17 00:00:00 2001 +From: Wayne Davison <wa...@opencoder.net> +Date: Tue, 5 Nov 2024 11:01:03 -0800 +Subject: [PATCH] Another cast when multiplying integers. + +CVE: CVE-2024-12084 + +Upstream-Status: Backport [https://git.samba.org/?p=rsync.git;a=commit;h=42e2b56c4ede3ab164f9a5c6dae02aa84606a6c1] + +Signed-off-by: Archana Polampalli <archana.polampa...@windriver.com> +--- + rsync.h | 2 +- + sender.c | 2 +- + 2 files changed, 2 insertions(+), 2 deletions(-) + +diff --git a/rsync.h b/rsync.h +index 8ddbe702..0f9e277f 100644 +--- a/rsync.h ++++ b/rsync.h +@@ -982,7 +982,7 @@ struct map_struct { + int status; /* first errno from read errors */ + }; + +-#define sum2_at(s, i) ((s)->sum2_array + ((OFF_T)(i) * xfer_sum_len)) ++#define sum2_at(s, i) ((s)->sum2_array + ((size_t)(i) * xfer_sum_len)) + + #define NAME_IS_FILE (0) /* filter name as a file */ + #define NAME_IS_DIR (1<<0) /* filter name as a dir */ +diff --git a/sender.c b/sender.c +index ab205341..2bbff2fa 100644 +--- a/sender.c ++++ b/sender.c +@@ -95,7 +95,7 @@ static struct sum_struct *receive_sums(int f) + return(s); + + s->sums = new_array(struct sum_buf, s->count); +- s->sum2_array = new_array(char, s->count * xfer_sum_len); ++ s->sum2_array = new_array(char, (size_t)s->count * xfer_sum_len); + + for (i = 0; i < s->count; i++) { + s->sums[i].sum1 = read_int(f); +-- +2.40.0 diff --git a/meta/recipes-devtools/rsync/rsync_3.2.7.bb b/meta/recipes-devtools/rsync/rsync_3.2.7.bb index 130581a785..2f3ea61978 100644 --- a/meta/recipes-devtools/rsync/rsync_3.2.7.bb +++ b/meta/recipes-devtools/rsync/rsync_3.2.7.bb @@ -15,6 +15,8 @@ SRC_URI = "https://download.samba.org/pub/${BPN}/src/${BP}.tar.gz \ file://makefile-no-rebuild.patch \ file://determism.patch \ file://0001-Add-missing-prototypes-to-function-declarations.patch \ + file://CVE-2024-12084-0001.patch \ + file://CVE-2024-12084-0002.patch \ " SRC_URI[sha256sum] = "4e7d9d3f6ed10878c58c5fb724a67dacf4b6aac7340b13e488fb2dc41346f2bb" -- 2.40.0
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