Libjpeg
CVE-2021-39518
MEDIUM
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
An issue was discovered in libjpeg through 2020021. LineBuffer::FetchRegion() in linebuffer.cpp has a heap-based buffer overflow.
AnalysisAI
An issue was discovered in libjpeg through 2020021. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. An issue was discovered in libjpeg through 2020021. LineBuffer::FetchRegion() in linebuffer.cpp has a heap-based buffer overflow. Affected products include: Jpeg Libjpeg. Version information: through 2020021..
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).
libjpeg commit 281daa9 was discovered to contain an infinite loop via the component Frame::ParseTrailer. Rated high seve
In IJG JPEG (aka libjpeg) from version 8 through 9c, jdhuff.c has an out-of-bounds array read for certain table pointers
libjpeg commit db33a6e was discovered to contain a heap buffer overflow via LineBitmapRequester::EncodeRegion at linebit
libjpeg commit db33a6e was discovered to contain a reachable assertion via BitMapHook::BitMapHook at bitmaphook.cpp. Rat
libjpeg commit 281daa9 was discovered to contain a segmentation fault via LineMerger::GetNextLowpassLine at linemerger.c
libjpeg commit 281daa9 was discovered to contain a segmentation fault via HuffmanDecoder::Get at huffmandecoder.hpp. Rat
There is an assertion failure in SingleComponentLSScan::ParseMCU in singlecomponentlsscan.cpp in libjpeg before 1.64 via
In libjpeg before 1.64, BitStream<false>::Get in bitstream.hpp has an assertion failure that may cause denial of service
An issue was discovered in libjpeg through 2020021. Rated medium severity (CVSS 6.5), this vulnerability is remotely exp
An issue was discovered in libjpeg through 2020021. Rated medium severity (CVSS 6.5), this vulnerability is remotely exp
An issue was discovered in libjpeg through 2020021. Rated medium severity (CVSS 6.5), this vulnerability is remotely exp
An issue was discovered in libjpeg through 2020021. Rated medium severity (CVSS 6.5), this vulnerability is remotely exp
Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today