CVE-2024-12747

A flaw was found in rsync. This vulnerability arises from a race condition during rsync's handling of symbolic links. Rsync's default behavior when encountering symbolic links is to skip them. If an attacker replaced a regular file with a symbolic link at the right time, it was possible to bypass the default behavior and traverse symbolic links. Depending on the privileges of the rsync process, an attacker could leak sensitive information, potentially leading to privilege escalation.

A flaw was found in rsync. This vulnerability arises from a race condition during rsync's handling of symbolic links. Rsync's default behavior when encountering symbolic links is to skip them. If an attacker replaced a regular file with a symbolic link at the right time, it was possible to bypass the default behavior and traverse symbolic links. Depending on the privileges of the rsync process, an attacker could leak sensitive information, potentially leading to privilege escalation.

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

(CVE-2024-12085)

(CVE-2024-12086)

(CVE-2024-12087)

(CVE-2024-12088)

(CVE-2024-12747)

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

(CVE-2024-12084)

(CVE-2024-12085)

(CVE-2024-12086)

(CVE-2024-12087)

(CVE-2024-12088)

(CVE-2024-12747)

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

(CVE-2024-12085)

(CVE-2024-12086)

(CVE-2024-12087)

(CVE-2024-12088)

(CVE-2024-12747)

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

(CVE-2024-12085)

(CVE-2024-12086)

(CVE-2024-12087)

(CVE-2024-12088)

(CVE-2024-12747)

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

(CVE-2024-12084)

(CVE-2024-12085)

(CVE-2024-12086)

(CVE-2024-12087)

(CVE-2024-12088)

(CVE-2024-12747)

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: Path traversal vulnerability in rsync (CVE-2024-12087)

• rsync: --safe-links option bypass leads to path traversal (CVE-2024-12088)

• rsync: Race Condition in rsync Handling Symbolic Links (CVE-2024-12747)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: Path traversal vulnerability in rsync (CVE-2024-12087)

• rsync: --safe-links option bypass leads to path traversal (CVE-2024-12088)

• rsync: Race Condition in rsync Handling Symbolic Links (CVE-2024-12747)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 9 Release Notes linked from the References section.

A flaw was found in rsync. This vulnerability arises from a race condition during rsync's handling of symbolic links. Rsync's default behavior when encountering symbolic links is to skip them. If an attacker replaced a regular file with a symbolic link at the right time, it was possible to bypass the default behavior and traverse symbolic links. Depending on the privileges of the rsync process, an attacker could leak sensitive information, potentially leading to privilege escalation.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: Path traversal vulnerability in rsync (CVE-2024-12087)
• rsync: --safe-links option bypass leads to path traversal (CVE-2024-12088)
• rsync: Race Condition in rsync Handling Symbolic Links (CVE-2024-12747)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

Security Fix(es):

• rsync: Path traversal vulnerability in rsync (CVE-2024-12087)
• rsync: --safe-links option bypass leads to path traversal (CVE-2024-12088)
• rsync: Race Condition in rsync Handling Symbolic Links (CVE-2024-12747)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinuxRelease Notes linked from the References section.

A flaw was found in rsync. This vulnerability arises from a race condition during rsync's handling of symbolic links. Rsync's default behavior when encountering symbolic links is to skip them. If an attacker replaced a regular file with a symbolic link at the right time, it was possible to bypass the default behavior and traverse symbolic links. Depending on the privileges of the rsync process, an attacker could leak sensitive information, potentially leading to privilege escalation.

A flaw was found in rsync. This vulnerability arises from a race condition during rsync's handling of symbolic links. Rsync's default behavior when encountering symbolic links is to skip them. If an attacker replaced a regular file with a symbolic link at the right time, it was possible to bypass the default behavior and traverse symbolic links. Depending on the privileges of the rsync process, an attacker could leak sensitive information, potentially leading to privilege escalation.

• CVE-2024-12747: fix race condition during symbolic links handling
• CVE-2024-12086: fix infoleak when connect to malicious server

• CVE-2024-12747: fix race condition during symbolic links handling
• CVE-2024-12086: fix infoleak when connect to malicious server

• SECURITY UPDATE: race condition during rsync's handling of symbolic links
  • debian/patches/CVE-2024-12747.patch: prevent symlink race preventing a normal file from being replaced by a symlink
  • CVE-2024-12747
• debian/rules, debian/patches/series: use series file to manage patches
• debian/patches/ssh-6-option.diff make it compatible with Quilt

• CVE-2024-12747: fix symlink race conditions

• CVE-2024-12747: fix symlink race condition in sender

• CVE-2024-12747: fix symlink race condition in sender

• SECURITY UPDATE: race condition during rsync's handling of symbolic links
  • debian/patches/CVE-2024-12747.patch: prevent symlink race preventing a normal file from being replaced by a symlink
  • CVE-2024-12747
• debian/rules, debian/patches/series: use series file to manage patches
• debian/patches/ssh-6-option.diff: adjust changes to align with the new patch application approach.

• CVE-2024-12747: fix symlink race condition in sender

• CVE-2025-10158: fix invalid access to files array in sender
• CVE-2024-12747: fix symlink race condition in sender
• CVE-2024-12086: fix server leak of arbitrary client files via crafted checksums and fuzzy basis

Heap buffer overflow in rsync due to improper checksum length handling. (CVE-2024-12084) Info leak via uninitialized stack contents. (CVE-2024-12085) Rsync server leaks arbitrary client files. (CVE-2024-12086) Path traversal vulnerability in rsync. (CVE-2024-12087) Rsync --safe-links option bypass leads to path traversal. (CVE-2024-12088) Race condition in rsync handling symbolic links. (CVE-2024-12747)

These are all security issues fixed in the rsync-3.4.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for rsync fixes the following issues:

• CVE-2024-12084: heap buffer overflow in checksum parsing. (bsc#1234100)
• CVE-2024-12085: leak of uninitialized stack data on the server leading to possible ASLR bypass. (bsc#1234101)
• CVE-2024-12086: leak of a client machine's file contents through the processing of checksum data. (bsc#1234102)
• CVE-2024-12087: arbitrary file overwrite possible on clients when symlink syncing is enabled. (bsc#1234103)
• CVE-2024-12088: bypass of the --safe-links flag may allow the placement of unsafe symlinks in a client. (bsc#1234104)
• CVE-2024-12747: race condition in rsync handling symbolic links (bsc#1235475)

This update for rsync fixes the following issues:

• CVE-2024-12085: leak of uninitialized stack data on the server leading to possible ASLR bypass. (bsc#1234101)
• CVE-2024-12086: leak of a client machine's file contents through the processing of checksum data. (bsc#1234102)
• CVE-2024-12087: arbitrary file overwrite possible on clients when symlink syncing is enabled. (bsc#1234103)
• CVE-2024-12088: bypass of the --safe-links flag may allow the placement of unsafe symlinks in a client. (bsc#1234104)
• CVE-2024-12747: Fixed a race condition in rsync handling symbolic links. (bsc#1235475)

This update for rsync fixes the following issues:

• CVE-2024-12085: leak of uninitialized stack data on the server leading to possible ASLR bypass. (bsc#1234101)
• CVE-2024-12086: leak of a client machine's file contents through the processing of checksum data. (bsc#1234102)
• CVE-2024-12087: arbitrary file overwrite possible on clients when symlink syncing is enabled. (bsc#1234103)
• CVE-2024-12088: bypass of the --safe-links flag may allow the placement of unsafe symlinks in a client. (bsc#1234104)
• CVE-2024-12747: Fixed a race condition in rsync handling symbolic links. (bsc#1235475)

This update for rsync fixes the following issues:

• CVE-2024-12085: leak of uninitialized stack data on the server leading to possible ASLR bypass. (bsc#1234101)
• CVE-2024-12086: leak of a client machine's file contents through the processing of checksum data. (bsc#1234102)
• CVE-2024-12087: arbitrary file overwrite possible on clients when symlink syncing is enabled. (bsc#1234103)
• CVE-2024-12088: bypass of the --safe-links flag may allow the placement of unsafe symlinks in a client. (bsc#1234104)
• CVE-2024-12747: Fixed a race condition in handling symbolic links. (bsc#1235475)

This update for rsync fixes the following issues:

• CVE-2024-12747: Fixed race condition in handling symbolic links (bsc#1235475)

• Broken rsyncd after protocol bump, regression reported (bsc#1237187).

• Bump protocol version to 32 - make it easier to show server is patched.

This update for rsync fixes the following issues:

• CVE-2024-12084: Fixed Heap Buffer Overflow in Checksum Parsing (bsc#1234100).
• CVE-2024-12085: Fixed Info Leak via uninitialized Stack contents defeating ASLR (bsc#1234101).
• CVE-2024-12086: Fixed server leaking arbitrary client files (bsc#1234102).
• CVE-2024-12087: Fixed server use of symbolic links to make client write files outside of destination directory (bsc#1234103).
• CVE-2024-12088: Fixed --safe-links bypass (bsc#1234104).
• CVE-2024-12747: Fixed Race Condition in rsync Handling Symbolic Links (bsc#1235475).

This update for rsync fixes the following issues:

• Bump protocol version to 32 - make it easier to show server is patched.

• Fix FLAG_GOT_DIR_FLIST collission with FLAG_HLINKED

• Security update,CVE-2024-12747, bsc#1235475 race condition in handling symbolic links

• Security update, fix multiple vulnerabilities:

  • CVE-2024-12084, bsc#1234100 - Heap Buffer Overflow in Checksum Parsing
  • CVE-2024-12085, bsc#1234101 - Info Leak via uninitialized Stack contents defeats ASLR
  • CVE-2024-12086, bsc#1234102 - Server leaks arbitrary client files
  • CVE-2024-12087, bsc#1234103 - Server can make client write files outside of destination directory using symbolic links
  • CVE-2024-12088, bsc#1234104 - --safe-links Bypass

This update for rsync fixes the following issues

• CVE-2026-29518: Symlink-Race TOCTOU in Daemon (bsc#1264511).
• CVE-2026-41035: Count of entries mismatch can lead to a use-after-free (bsc#1262223)
• CVE-2026-43617: Authorization Bypass via Hostname Resolution (bsc#1264515).
• CVE-2026-43618: Integer Overflow Information Disclosure (bsc#1264512).
• CVE-2026-43619: Symlink Race Condition via Path-Based Syscalls (bsc#1264514).
• CVE-2026-43620: Out-of-Bounds Array Read via recv_files() (bsc#1264513).
• CVE-2026-45232: Off-by-one stack OOB write in HTTP CONNECT proxy response parsing (bsc#1265296).

This update for rsync fixes the following issues

• CVE-2026-29518: Symlink-Race TOCTOU in Daemon (bsc#1264511).
• CVE-2026-43617: Authorization Bypass via Hostname Resolution (bsc#1264515).
• CVE-2026-43618: Integer Overflow Information Disclosure (bsc#1264512).
• CVE-2026-43620: Out-of-Bounds Array Read via recv_files() (bsc#1264513).
• CVE-2026-45232: Off-by-one stack OOB write in HTTP CONNECT proxy response parsing (bsc#1265296).

This update for rsync fixes the following issues

• CVE-2026-29518: Symlink-Race TOCTOU in Daemon (bsc#1264511).
• CVE-2026-41035: count of entries mismatch can lead to a use-after-free (bsc#1262223).
• CVE-2026-43617: Authorization Bypass via Hostname Resolution (bsc#1264515).
• CVE-2026-43618: Integer Overflow Information Disclosure (bsc#1264512).
• CVE-2026-43620: Out-of-Bounds Array Read via recv_files() (bsc#1264513).
• CVE-2026-45232: Off-by-one stack OOB write in HTTP CONNECT proxy response parsing (bsc#1265296).

This update for rsync fixes the following issues

Security issues:

• CVE-2026-29518: Symlink-Race TOCTOU in Daemon (bsc#1264511).
• CVE-2026-43617: Authorization Bypass via Hostname Resolution (bsc#1264515).
• CVE-2026-43618: Integer Overflow Information Disclosure (bsc#1264512).
• CVE-2026-43619: Symlink Race Condition via Path-Based Syscalls (bsc#1264514).
• CVE-2026-43620: Out-of-Bounds Array Read via recv_files() (bsc#1264513).
• CVE-2026-45232: Off-by-one stack OOB write in HTTP CONNECT proxy response parsing (bsc#1265296).

Non security issues:

• rsync --delay-updates never updates after interruption (bsc#1204538).
• Fix duplication of flag causing illegal hashkey failures.

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync did not properly handle checksum lengths. An attacker could use this issue to execute arbitrary code. (CVE-2024-12084)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync compared checksums with uninitialized memory. An attacker could exploit this issue to leak sensitive information. (CVE-2024-12085)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync incorrectly handled file checksums. A malicious server could use this to expose arbitrary client files. (CVE-2024-12086)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync mishandled symlinks for some settings. An attacker could exploit this to write files outside the intended directory. (CVE-2024-12087)

Simon Scannell, Pedro Gallegos, and Jasiel Spelman discovered that rsync failed to verify symbolic link destinations for some settings. An attacker could exploit this for path traversal attacks. (CVE-2024-12088)

Aleksei Gorban discovered a race condition in rsync's handling of symbolic links. An attacker could use this to access sensitive information or escalate privileges. (CVE-2024-12747)