CVE-2019-11704
published 2019-07-23CVE-2019-11704: A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting…
PriorityP261critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EXPLOIT
EPSS
10.53%
95.2th percentile
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | thunderbird | < thunderbird 1:60.7.1-1 (bookworm) | thunderbird 1:60.7.1-1 (bookworm) |
| mozilla | thunderbird | < 60.7.1 | 60.7.1 |
| mozilla | thunderbird | >= 0 < 1:60.7.1-1 | 1:60.7.1-1 |
| mozilla | thunderbird | >= 0 < 1:60.7.1-1 | 1:60.7.1-1 |
| mozilla | thunderbird | >= 0 < 1:60.7.1-1 | 1:60.7.1-1 |
| mozilla | thunderbird | >= 0 < 1:60.7.1-1 | 1:60.7.1-1 |
| mozilla | thunderbird | >= unspecified < 60.7.1 | 60.7.1 |
Detection & IOCsextracted from sources · hover to see the quote
- →No user interaction is required; the vulnerability can be triggered purely by receiving a specially crafted calendar attachment, making it suitable for detection at the mail gateway/MTA level by inspecting iCal attachments for strings ending with a backslash before a field terminator ↗
- →Monitor for Thunderbird process crashes (heap corruption) coinciding with receipt of email containing iCal/calendar MIME attachments (Content-Type: text/calendar or application/ics) ↗
- ·Setting calendar.icaljs = true in Thunderbird preferences switches the iCal parser from the vulnerable libical (C) to icaljs (JavaScript), fully mitigating this vulnerability without requiring a patch ↗
- ·The vulnerable code originates from a fork of upstream libical version 0.47; upstream fixed this in v1.0.0 (commit a4230eb8) but the fix was never backported to Thunderbird's bundled copy until ESR 60.7.1 ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2019-06-20
CVE-2019-11703 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple memory safety issues were discovered in Thunderbird. If a user
were tricked in to opening a specially crafted message, an attacker could
potentially exploit these to cause a denial of service, or execute
arbitrary code.
Instructions: After a standard system update you need to restart Thunderbird to make
all the necessary changes.
Red Hat
libical: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c
vendor_redhat·2019-06-13·CVSS 9.8
CVE-2019-11704 [CRITICAL] CWE-122 libical: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c
libical: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
Mitigation: Thunderbird can be configured to use icaljs instead of libical by setting `calendar.icaljs = true` in preferences, mitigating this vulnerability.
Package: libical (Red Hat Enterprise Linux 6) - Out of support scope
Package: libical (Red Hat Enterprise Linux 7) - Not affected
Package: libical (Red Hat Enterprise Linux 8) - Not affected
Debian
CVE-2019-11704: thunderbird - A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in ...
vendor_debian·2019·CVSS 9.8
CVE-2019-11704 [CRITICAL] CVE-2019-11704: thunderbird - A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in ...
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
Scope: local
bookworm: resolved (fixed in 1:60.7.1-1)
bullseye: resolved (fixed in 1:60.7.1-1)
forky: resolved (fixed in 1:60.7.1-1)
sid: resolved (fixed in 1:60.7.1-1)
trixie: resolved (fixed in 1:60.7.1-1)
GHSA
GHSA-7hpm-8887-xq76: A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages,
ghsa_unreviewed·2022-05-24
CVE-2019-11704 [CRITICAL] CWE-119 GHSA-7hpm-8887-xq76: A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages,
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
OSV
CVE-2019-11704: A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages,
osv·2019-07-23·CVSS 9.8
CVE-2019-11704 [CRITICAL] CVE-2019-11704: A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages,
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
No detection rules found.
Bugzilla
CVE-2019-11704 thunderbird: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c [fedora-all]
bugzilla·2019-06-14·CVSS 9.8
CVE-2019-11704 [CRITICAL] CVE-2019-11704 thunderbird: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c [fedora-all]
CVE-2019-11704 thunderbird: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this
Bugzilla
CVE-2019-11704 libical: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c
bugzilla·2019-06-12·CVSS 9.8
CVE-2019-11704 [CRITICAL] CVE-2019-11704 libical: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c
CVE-2019-11704 libical: Heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c
A flaw was found in Mozzila Thunderbird. A heap buffer overflow in icalmemory_strdup_and_dequote function in icalvalue.c might lead to out of bounds read, write, and process crash.
References:
https://bugzilla.mozilla.org/show_bug.cgi?id=1553814
Discussion:
Is this for Thunderbird only, or the libical package is also affected? I would verify that myself, but I do not have access to any related bug report mentioned here, neither to the upstream Mozilla bug.
---
Mitigation:
Thunderbird can be configured to use icaljs instead of libical by setting `calendar.icaljs = true` in preferences, mitigating this vulnerability.
---
Created thunderbird tracking bugs for this issue:
Affects: f
https://bugzilla.mozilla.org/show_bug.cgi?id=1553814https://security.gentoo.org/glsa/201908-20https://www.mozilla.org/security/advisories/mfsa2019-17/https://bugzilla.mozilla.org/show_bug.cgi?id=1553814https://security.gentoo.org/glsa/201908-20https://www.mozilla.org/security/advisories/mfsa2019-17/
2019-07-23
Published